diff --git a/adminer/call.inc.php b/adminer/call.inc.php
index 67b0eab5..4bc37972 100644
--- a/adminer/call.inc.php
+++ b/adminer/call.inc.php
@@ -92,10 +92,9 @@ if ($in) {
 <pre>
 <?php
 /** Format string as table row
-* @param string $s
 * @return string HTML
 */
-function pre_tr($s) {
+function pre_tr(string $s) {
 	return preg_replace('~^~m', '<tr>', preg_replace('~\|~', '<td>', preg_replace('~\|$~m', "", rtrim($s))));
 }
 
diff --git a/adminer/drivers/mysql.inc.php b/adminer/drivers/mysql.inc.php
index d975b680..2f67494f 100644
--- a/adminer/drivers/mysql.inc.php
+++ b/adminer/drivers/mysql.inc.php
@@ -84,10 +84,9 @@ if (!defined('Adminer\DRIVER')) {
 			}
 
 			/** Set the client character set
-			* @param string $charset
 			* @return bool
 			*/
-			function set_charset($charset) {
+			function set_charset(string $charset) {
 				if (function_exists('mysql_set_charset')) {
 					if (mysql_set_charset($charset, $this->link)) {
 						return true;
@@ -129,9 +128,8 @@ if (!defined('Adminer\DRIVER')) {
 			/** @var int */ private $offset = 0;
 
 			/** Constructor
-			* @param resource $result
 			*/
-			function __construct($result) {
+			function __construct(resource $result) {
 				$this->result = $result;
 				$this->num_rows = mysql_num_rows($result);
 			}
@@ -359,18 +357,16 @@ if (!defined('Adminer\DRIVER')) {
 
 
 	/** Escape database identifier
-	* @param string $idf
 	* @return string
 	*/
-	function idf_escape($idf) {
+	function idf_escape(string $idf) {
 		return "`" . str_replace("`", "``", $idf) . "`";
 	}
 
 	/** Get escaped table name
-	* @param string $idf
 	* @return string
 	*/
-	function table($idf) {
+	function table(string $idf) {
 		return idf_escape($idf);
 	}
 
@@ -378,7 +374,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param array{string, string, string} $credentials [$server, $username, $password]
 	* @return string|Db string for error
 	*/
-	function connect($credentials) {
+	function connect(array $credentials) {
 		global $drivers;
 		$connection = new Db;
 		if ($connection->connect($credentials[0], $credentials[1], $credentials[2])) {
@@ -396,10 +392,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get cached list of databases
-	* @param bool $flush
 	* @return list<string>
 	*/
-	function get_databases($flush) {
+	function get_databases(bool $flush) {
 		// SHOW DATABASES can take a very long time so it is cached
 		$return = get_session("dbs");
 		if ($return === null) {
@@ -415,32 +410,25 @@ if (!defined('Adminer\DRIVER')) {
 	/** Formulate SQL query with limit
 	* @param string $query everything after SELECT
 	* @param string $where including WHERE
-	* @param int $limit
-	* @param int $offset
-	* @param string $separator
 	* @return string
 	*/
-	function limit($query, $where, $limit, $offset = 0, $separator = " ") {
+	function limit(string $query, string $where, int $limit, int $offset = 0, string $separator = " ") {
 		return " $query$where" . ($limit !== null ? $separator . "LIMIT $limit" . ($offset ? " OFFSET $offset" : "") : "");
 	}
 
 	/** Formulate SQL modification query with limit 1
-	* @param string $table
 	* @param string $query everything after UPDATE or DELETE
-	* @param string $where
-	* @param string $separator
 	* @return string
 	*/
-	function limit1($table, $query, $where, $separator = "\n") {
+	function limit1(string $table, string $query, string $where, string $separator = "\n") {
 		return limit($query, $where, 1, 0, $separator);
 	}
 
 	/** Get database collation
-	* @param string $db
 	* @param string[][] $collations result of collations()
 	* @return string
 	*/
-	function db_collation($db, $collations) {
+	function db_collation(string $db, array $collations) {
 		$return = null;
 		$create = get_val("SHOW CREATE DATABASE " . idf_escape($db), 1);
 		if (preg_match('~ COLLATE ([^ ]+)~', $create, $match)) {
@@ -470,7 +458,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param list<string> $databases
 	* @return int[] [$db => $tables]
 	*/
-	function count_tables($databases) {
+	function count_tables(array $databases) {
 		$return = array();
 		foreach ($databases as $db) {
 			$return[$db] = count(get_vals("SHOW TABLES IN " . idf_escape($db)));
@@ -479,11 +467,10 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get table status
-	* @param string $name
 	* @param bool $fast return only "Name", "Engine" and "Comment" fields
 	* @return TableStatus[]
 	*/
-	function table_status($name = "", $fast = false) {
+	function table_status(string $name = "", bool $fast = false) {
 		$return = array();
 		foreach (
 			get_rows(
@@ -512,7 +499,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param TableStatus $table_status
 	* @return bool
 	*/
-	function is_view($table_status) {
+	function is_view(array $table_status) {
 		return $table_status["Engine"] === null;
 	}
 
@@ -520,15 +507,14 @@ if (!defined('Adminer\DRIVER')) {
 	* @param TableStatus $table_status result of table_status1()
 	* @return bool
 	*/
-	function fk_support($table_status) {
+	function fk_support(array $table_status) {
 		return preg_match('~InnoDB|IBMDB2I' . (min_version(5.6) ? '|NDB' : '') . '~i', $table_status["Engine"]);
 	}
 
 	/** Get information about fields
-	* @param string $table
 	* @return Field[]
 	*/
-	function fields($table) {
+	function fields(string $table) {
 		global $connection;
 		$maria = ($connection->flavor == 'maria');
 		$return = array();
@@ -580,11 +566,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get table indexes
-	* @param string $table
-	* @param ?Db $connection2
 	* @return Index[]
 	*/
-	function indexes($table, $connection2 = null) {
+	function indexes(string $table, ?Db $connection2 = null) {
 		$return = array();
 		foreach (get_rows("SHOW INDEX FROM " . table($table), $connection2) as $row) {
 			$name = $row["Key_name"];
@@ -597,10 +581,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get foreign keys in table
-	* @param string $table
 	* @return ForeignKey[]
 	*/
-	function foreign_keys($table) {
+	function foreign_keys(string $table) {
 		global $driver;
 		static $pattern = '(?:`(?:[^`]|``)+`|"(?:[^"]|"")+")';
 		$return = array();
@@ -629,10 +612,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get view SELECT
-	* @param string $name
 	* @return array{select:string}
 	*/
-	function view($name) {
+	function view(string $name) {
 		return array("select" => preg_replace('~^(?:[^`]|`[^`]*`)*\s+AS\s+~isU', '', get_val("SHOW CREATE VIEW " . table($name), 1)));
 	}
 
@@ -656,10 +638,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Find out if database is information_schema
-	* @param string $db
 	* @return bool
 	*/
-	function information_schema($db) {
+	function information_schema(string $db) {
 		return ($db == "information_schema")
 			|| (min_version(5.5) && $db == "performance_schema");
 	}
@@ -673,11 +654,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Create database
-	* @param string $db
-	* @param string $collation
 	* @return Result
 	*/
-	function create_database($db, $collation) {
+	function create_database(string $db, string $collation) {
 		return queries("CREATE DATABASE " . idf_escape($db) . ($collation ? " COLLATE " . q($collation) : ""));
 	}
 
@@ -685,7 +664,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param list<string> $databases
 	* @return bool
 	*/
-	function drop_databases($databases) {
+	function drop_databases(array $databases) {
 		$return = apply_queries("DROP DATABASE", $databases, 'Adminer\idf_escape');
 		restart_session();
 		set_session("dbs", null);
@@ -694,10 +673,9 @@ if (!defined('Adminer\DRIVER')) {
 
 	/** Rename database from DB
 	* @param string $name new name
-	* @param string $collation
 	* @return bool
 	*/
-	function rename_database($name, $collation) {
+	function rename_database(string $name, string $collation) {
 		$return = false;
 		if (create_database($name, $collation)) {
 			$tables = array();
@@ -740,14 +718,10 @@ if (!defined('Adminer\DRIVER')) {
 	* @param string $name new name
 	* @param list<array{string, list<string>, string}> $fields of [$orig, $process_field, $after]
 	* @param string[] $foreign
-	* @param string $comment
-	* @param string $engine
-	* @param string $collation
 	* @param string $auto_increment number
-	* @param string $partitioning
 	* @return Result|bool
 	*/
-	function alter_table($table, $name, $fields, $foreign, $comment, $engine, $collation, $auto_increment, $partitioning) {
+	function alter_table(string $table, string $name, array $fields, array $foreign, string $comment, string $engine, string $collation, string $auto_increment, string $partitioning) {
 		global $connection;
 		$alter = array();
 		foreach ($fields as $field) {
@@ -786,7 +760,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param list<array{string, string, 'DROP'|list<string>}> $alter of ["index type", "name", ["column definition", ...]] or ["index type", "name", "DROP"]
 	* @return Result|bool
 	*/
-	function alter_indexes($table, $alter) {
+	function alter_indexes(string $table, $alter) {
 		$changes = array();
 		foreach ($alter as $val) {
 			$changes[] = ($val[2] == "DROP"
@@ -801,7 +775,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param list<string> $tables
 	* @return bool
 	*/
-	function truncate_tables($tables) {
+	function truncate_tables(array $tables) {
 		return apply_queries("TRUNCATE TABLE", $tables);
 	}
 
@@ -809,7 +783,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param list<string> $views
 	* @return Result|bool
 	*/
-	function drop_views($views) {
+	function drop_views(array $views) {
 		return queries("DROP VIEW " . implode(", ", array_map('Adminer\table', $views)));
 	}
 
@@ -817,17 +791,16 @@ if (!defined('Adminer\DRIVER')) {
 	* @param list<string> $tables
 	* @return Result|bool
 	*/
-	function drop_tables($tables) {
+	function drop_tables(array $tables) {
 		return queries("DROP TABLE " . implode(", ", array_map('Adminer\table', $tables)));
 	}
 
 	/** Move tables to other schema
 	* @param list<string> $tables
 	* @param list<string> $views
-	* @param string $target
 	* @return bool
 	*/
-	function move_tables($tables, $views, $target) {
+	function move_tables(array $tables, array $views, string $target) {
 		global $connection;
 		$rename = array();
 		foreach ($tables as $table) {
@@ -854,10 +827,9 @@ if (!defined('Adminer\DRIVER')) {
 	/** Copy tables to other schema
 	* @param list<string> $tables
 	* @param list<string> $views
-	* @param string $target
 	* @return bool
 	*/
-	function copy_tables($tables, $views, $target) {
+	function copy_tables(array $tables, array $views, string $target) {
 		queries("SET sql_mode = 'NO_AUTO_VALUE_ON_ZERO'");
 		foreach ($tables as $table) {
 			$name = ($target == DB ? table("copy_$table") : idf_escape($target) . "." . table($table));
@@ -890,10 +862,9 @@ if (!defined('Adminer\DRIVER')) {
 
 	/** Get information about trigger
 	* @param string $name trigger name
-	* @param string $table
 	* @return Trigger
 	*/
-	function trigger($name, $table) {
+	function trigger(string $name, string $table) {
 		if ($name == "") {
 			return array();
 		}
@@ -902,10 +873,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get defined triggers
-	* @param string $table
 	* @return array{string, string}[]
 	*/
-	function triggers($table) {
+	function triggers(string $table) {
 		$return = array();
 		foreach (get_rows("SHOW TRIGGERS LIKE " . q(addcslashes($table, "%_\\"))) as $row) {
 			$return[$row["Trigger"]] = array($row["Timing"], $row["Event"]);
@@ -925,11 +895,10 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get information about stored routine
-	* @param string $name
 	* @param 'FUNCTION'|'PROCEDURE' $type
 	* @return Routine
 	*/
-	function routine($name, $type) {
+	function routine(string $name, $type) {
 		global $driver;
 		$aliases = array("bool", "boolean", "integer", "double precision", "real", "dec", "numeric", "fixed", "national char", "national varchar");
 		$space = "(?:\\s|/\\*[\s\S]*?\\*/|(?:#|-- )[^\n]*\n?|--\r?\n)";
@@ -978,11 +947,10 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get routine signature
-	* @param string $name
 	* @param Routine $row result of routine()
 	* @return string
 	*/
-	function routine_id($name, $row) {
+	function routine_id(string $name, array $row) {
 		return idf_escape($name);
 	}
 
@@ -995,11 +963,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Explain select
-	* @param Db $connection
-	* @param string $query
 	* @return Result
 	*/
-	function explain($connection, $query) {
+	function explain(Db $connection, string $query) {
 		return $connection->query("EXPLAIN " . (min_version(5.1) && !min_version(5.7) ? "PARTITIONS " : "") . $query);
 	}
 
@@ -1008,17 +974,14 @@ if (!defined('Adminer\DRIVER')) {
 	* @param list<string> $where
 	* @return numeric-string|null null if approximate number can't be retrieved
 	*/
-	function found_rows($table_status, $where) {
+	function found_rows(array $table_status, array $where) {
 		return ($where || $table_status["Engine"] != "InnoDB" ? null : $table_status["Rows"]);
 	}
 
 	/** Get SQL command to create table
-	* @param string $table
-	* @param bool $auto_increment
-	* @param string $style
 	* @return string
 	*/
-	function create_sql($table, $auto_increment, $style) {
+	function create_sql(string $table, bool $auto_increment, string $style) {
 		$return = get_val("SHOW CREATE TABLE " . table($table), 1);
 		if (!$auto_increment) {
 			$return = preg_replace('~ AUTO_INCREMENT=\d+~', '', $return); //! skip comments
@@ -1027,26 +990,23 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get SQL command to truncate table
-	* @param string $table
 	* @return string
 	*/
-	function truncate_sql($table) {
+	function truncate_sql(string $table) {
 		return "TRUNCATE " . table($table);
 	}
 
 	/** Get SQL command to change database
-	* @param string $database
 	* @return string
 	*/
-	function use_sql($database) {
+	function use_sql(string $database) {
 		return "USE " . idf_escape($database);
 	}
 
 	/** Get SQL commands to create triggers
-	* @param string $table
 	* @return string
 	*/
-	function trigger_sql($table) {
+	function trigger_sql(string $table) {
 		$return = "";
 		foreach (get_rows("SHOW TRIGGERS LIKE " . q(addcslashes($table, "%_\\")), null, "-- ") as $row) {
 			$return .= "\nCREATE TRIGGER " . idf_escape($row["Trigger"]) . " $row[Timing] $row[Event] ON " . table($row["Table"]) . " FOR EACH ROW\n$row[Statement];;\n";
@@ -1079,7 +1039,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param Field $field one element from fields()
 	* @return string|void
 	*/
-	function convert_field($field) {
+	function convert_field(array $field) {
 		if (preg_match("~binary~", $field["type"])) {
 			return "HEX(" . idf_escape($field["field"]) . ")";
 		}
@@ -1096,7 +1056,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param string $return SQL expression
 	* @return string
 	*/
-	function unconvert_field($field, $return) {
+	function unconvert_field(array $field, string $return) {
 		if (preg_match("~binary~", $field["type"])) {
 			$return = "UNHEX($return)";
 		}
@@ -1114,7 +1074,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param literal-string $feature "check|comment|copy|database|descidx|drop_col|dump|event|indexes|kill|materializedview|partitioning|privileges|procedure|processlist|routine|scheme|sequence|status|table|trigger|type|variables|view|view_trigger"
 	* @return bool
 	*/
-	function support($feature) {
+	function support(string $feature) {
 		return !preg_match("~scheme|sequence|type|view_trigger|materializedview" . (min_version(8) ? "" : "|descidx" . (min_version(5.1) ? "" : "|event|partitioning")) . (min_version('8.0.16', '10.2.1') ? "" : "|check") . "~", $feature);
 	}
 
@@ -1122,7 +1082,7 @@ if (!defined('Adminer\DRIVER')) {
 	* @param numeric-string $val
 	* @return Result|bool
 	*/
-	function kill_process($val) {
+	function kill_process(string $val) {
 		return queries("KILL " . number($val));
 	}
 
@@ -1150,10 +1110,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Get values of user defined type
-	* @param int $id
 	* @return string
 	*/
-	function type_values($id) {
+	function type_values(int $id) {
 		return "";
 	}
 
@@ -1172,11 +1131,9 @@ if (!defined('Adminer\DRIVER')) {
 	}
 
 	/** Set current schema
-	* @param string $schema
-	* @param Db $connection2
 	* @return bool
 	*/
-	function set_schema($schema, $connection2 = null) {
+	function set_schema(string $schema, Db $connection2 = null) {
 		return true;
 	}
 }
diff --git a/adminer/drivers/sqlite.inc.php b/adminer/drivers/sqlite.inc.php
index 54211c27..da72e888 100644
--- a/adminer/drivers/sqlite.inc.php
+++ b/adminer/drivers/sqlite.inc.php
@@ -463,7 +463,7 @@ if (isset($_GET["sqlite"])) {
 	* @param string $add_check CHECK constraint to add
 	* @return bool
 	*/
-	function recreate_table($table, $name, $fields, $originals, $foreign, $auto_increment = 0, $indexes = array(), $drop_check = "", $add_check = "") {
+	function recreate_table(string $table, string $name, array $fields, array $originals, array $foreign, int $auto_increment = 0, $indexes = array(), string $drop_check = "", string $add_check = "") {
 		global $driver;
 		if ($table != "") {
 			if (!$fields) {
diff --git a/adminer/include/adminer.inc.php b/adminer/include/adminer.inc.php
index d9c1800b..d42d1cd5 100644
--- a/adminer/include/adminer.inc.php
+++ b/adminer/include/adminer.inc.php
@@ -28,10 +28,9 @@ class Adminer {
 	}
 
 	/** Get key used for permanent login
-	* @param bool $create
 	* @return string cryptic string which gets combined with password or false in case of an error
 	*/
-	function permanentLogin($create = false) {
+	function permanentLogin(bool $create = false) {
 		return password_file($create);
 	}
 
@@ -43,10 +42,9 @@ class Adminer {
 	}
 
 	/** Get server name displayed in breadcrumbs
-	* @param string $server
 	* @return string HTML code or null
 	*/
-	function serverName($server) {
+	function serverName(string $server) {
 		return h($server);
 	}
 
@@ -59,10 +57,9 @@ class Adminer {
 	}
 
 	/** Get cached list of databases
-	* @param bool $flush
 	* @return list<string>
 	*/
-	function databases($flush = true) {
+	function databases(bool $flush = true) {
 		return get_databases($flush);
 	}
 
@@ -97,7 +94,7 @@ class Adminer {
 	* @param bool $dark dark CSS: false to disable, true to force, null to base on user preferences
 	* @return bool true to link favicon.ico
 	*/
-	function head($dark = null) {
+	function head(bool $dark = null) {
 		// this is matched by compile.php
 		echo "<link rel='stylesheet' href='../externals/jush/jush.css'>\n";
 		echo ($dark !== false ? "<link rel='stylesheet'" . ($dark ? "" : " media='(prefers-color-scheme: dark)'") . " href='../externals/jush/jush-dark.css'>\n" : "");
@@ -137,21 +134,18 @@ class Adminer {
 	}
 
 	/** Get login form field
-	* @param string $name
 	* @param string $heading HTML
 	* @param string $value HTML
 	* @return string
 	*/
-	function loginFormField($name, $heading, $value) {
+	function loginFormField(string $name, string $heading, string $value) {
 		return $heading . $value . "\n";
 	}
 
 	/** Authorize the user
-	* @param string $login
-	* @param string $password
 	* @return mixed true for success, string for error message, false for unknown error
 	*/
-	function login($login, $password) {
+	function login(string $login, string $password) {
 		if ($password == "") {
 			return lang('Adminer does not support accessing a database without a password, <a href="https://www.adminer.org/en/password/"%s>more information</a>.', target_blank());
 		}
@@ -162,7 +156,7 @@ class Adminer {
 	* @param TableStatus $tableStatus result of table_status1()
 	* @return string HTML code, "" to ignore table
 	*/
-	function tableName($tableStatus) {
+	function tableName(array $tableStatus) {
 		return h($tableStatus["Name"]);
 	}
 
@@ -171,7 +165,7 @@ class Adminer {
 	* @param int $order order of column in select
 	* @return string HTML code, "" to ignore field
 	*/
-	function fieldName($field, $order = 0) {
+	function fieldName(array $field, int $order = 0) {
 		$type = $field["full_type"];
 		$comment = $field["comment"];
 		return '<span title="' . h($type . ($comment != "" ? ($type ? ": " : "") . $comment : '')) . '">' . h($field["field"]) . '</span>';
@@ -182,7 +176,7 @@ class Adminer {
 	* @param string $set new item options, NULL for no new item
 	* @return void
 	*/
-	function selectLinks($tableStatus, $set = "") {
+	function selectLinks(array $tableStatus, string $set = "") {
 		global $driver;
 		echo '<p class="links">';
 		$links = array("select" => lang('Select data'));
@@ -210,19 +204,16 @@ class Adminer {
 	}
 
 	/** Get foreign keys for table
-	* @param string $table
 	* @return ForeignKey[] same format as foreign_keys()
 	*/
-	function foreignKeys($table) {
+	function foreignKeys(string $table) {
 		return foreign_keys($table);
 	}
 
 	/** Find backward keys for table
-	* @param string $table
-	* @param string $tableName
 	* @return BackwardKey[]
 	*/
-	function backwardKeys($table, $tableName) {
+	function backwardKeys(string $table, string $tableName) {
 		return array();
 	}
 
@@ -231,16 +222,15 @@ class Adminer {
 	* @param string[] $row
 	* @return void
 	*/
-	function backwardKeysPrint($backwardKeys, $row) {
+	function backwardKeysPrint(array $backwardKeys, array $row) {
 	}
 
 	/** Query printed in select before execution
 	* @param string $query query to be executed
 	* @param float $start start time of the query
-	* @param bool $failed
 	* @return string
 	*/
-	function selectQuery($query, $start, $failed = false) {
+	function selectQuery(string $query, float $start, bool $failed = false) {
 		global $driver;
 		$return = "</p>\n"; // required for IE9 inline edit
 		if (!$failed && ($warnings = $driver->warnings())) {
@@ -259,7 +249,7 @@ class Adminer {
 	* @param string $query query to be executed
 	* @return string escaped query to be printed
 	*/
-	function sqlCommandQuery($query) {
+	function sqlCommandQuery(string $query) {
 		return shorten_utf8(trim($query), 1000);
 	}
 
@@ -270,10 +260,9 @@ class Adminer {
 	}
 
 	/** Description of a row in a table
-	* @param string $table
 	* @return string SQL expression, empty string for no description
 	*/
-	function rowDescription($table) {
+	function rowDescription(string $table) {
 		return "";
 	}
 
@@ -282,7 +271,7 @@ class Adminer {
 	* @param ForeignKey[] $foreignKeys
 	* @return list<string[]>
 	*/
-	function rowDescriptions($rows, $foreignKeys) {
+	function rowDescriptions(array $rows, array $foreignKeys) {
 		return $rows;
 	}
 
@@ -291,7 +280,7 @@ class Adminer {
 	* @param Field $field single field returned from fields()
 	* @return string|void null to create the default link
 	*/
-	function selectLink($val, $field) {
+	function selectLink(string $val, array $field) {
 	}
 
 	/** Value printed in select table
@@ -301,7 +290,7 @@ class Adminer {
 	* @param string $original original value before applying editVal() and escaping
 	* @return string
 	*/
-	function selectVal($val, $link, $field, $original) {
+	function selectVal(string $val, string $link, array $field, string $original) {
 		$return = ($val === null ? "<i>NULL</i>"
 			: (preg_match("~char|binary|boolean~", $field["type"]) && !preg_match("~var~", $field["type"]) ? "<code>$val</code>"
 			: (preg_match('~json~', $field["type"]) ? "<code class='jush-js'>$val</code>"
@@ -314,11 +303,10 @@ class Adminer {
 	}
 
 	/** Value conversion used in select and edit
-	* @param string $val
 	* @param Field $field single field returned from fields()
 	* @return string
 	*/
-	function editVal($val, $field) {
+	function editVal(string $val, array $field) {
 		return $val;
 	}
 
@@ -327,7 +315,7 @@ class Adminer {
 	* @param TableStatus $tableStatus
 	* @return void
 	*/
-	function tableStructurePrint($fields, $tableStatus = null) {
+	function tableStructurePrint(array $fields, array $tableStatus = null) {
 		global $driver;
 		echo "<div class='scrollable'>\n";
 		echo "<table class='nowrap odds'>\n";
@@ -358,7 +346,7 @@ class Adminer {
 	* @param Index[] $indexes data about all indexes on a table
 	* @return void
 	*/
-	function tableIndexesPrint($indexes) {
+	function tableIndexesPrint(array $indexes) {
 		echo "<table>\n";
 		foreach ($indexes as $name => $index) {
 			ksort($index["columns"]); // enforce correct columns order
@@ -379,7 +367,7 @@ class Adminer {
 	* @param string[] $columns selectable columns
 	* @return void
 	*/
-	function selectColumnsPrint($select, $columns) {
+	function selectColumnsPrint(array $select, array $columns) {
 		global $driver;
 		print_fieldset("select", lang('Select'), $select);
 		$i = 0;
@@ -407,7 +395,7 @@ class Adminer {
 	* @param Index[] $indexes
 	* @return void
 	*/
-	function selectSearchPrint($where, $columns, $indexes) {
+	function selectSearchPrint(array $where, array $columns, array $indexes) {
 		print_fieldset("search", lang('Search'), $where);
 		foreach ($indexes as $i => $index) {
 			if ($index["type"] == "FULLTEXT") {
@@ -443,7 +431,7 @@ class Adminer {
 	* @param Index[] $indexes
 	* @return void
 	*/
-	function selectOrderPrint($order, $columns, $indexes) {
+	function selectOrderPrint(array $order, array $columns, array $indexes) {
 		print_fieldset("sort", lang('Sort'), $order);
 		$i = 0;
 		foreach ((array) $_GET["order"] as $key => $val) {
@@ -462,7 +450,7 @@ class Adminer {
 	* @param string $limit result of selectLimitProcess()
 	* @return void
 	*/
-	function selectLimitPrint($limit) {
+	function selectLimitPrint(string $limit) {
 		echo "<fieldset><legend>" . lang('Limit') . "</legend><div>"; // <div> for easy styling
 		echo "<input type='number' name='limit' class='size' value='" . h($limit) . "'>";
 		echo script("qsl('input').oninput = selectFieldChange;", "");
@@ -473,7 +461,7 @@ class Adminer {
 	* @param string $text_length result of selectLengthProcess()
 	* @return void
 	*/
-	function selectLengthPrint($text_length) {
+	function selectLengthPrint(string $text_length) {
 		if ($text_length !== null) {
 			echo "<fieldset><legend>" . lang('Text length') . "</legend><div>";
 			echo "<input type='number' name='text_length' class='size' value='" . h($text_length) . "'>";
@@ -485,7 +473,7 @@ class Adminer {
 	* @param Index[] $indexes
 	* @return void
 	*/
-	function selectActionPrint($indexes) {
+	function selectActionPrint(array $indexes) {
 		echo "<fieldset><legend>" . lang('Action') . "</legend><div>";
 		echo "<input type='submit' value='" . lang('Select') . "'>";
 		echo " <span id='noindex' title='" . lang('Full table scan') . "'></span>";
@@ -527,7 +515,7 @@ class Adminer {
 	* @param string[] $columns selectable columns
 	* @return void
 	*/
-	function selectEmailPrint($emailFields, $columns) {
+	function selectEmailPrint(array $emailFields, array $columns) {
 	}
 
 	/** Process columns box in select
@@ -535,7 +523,7 @@ class Adminer {
 	* @param Index[] $indexes
 	* @return list<list<string>> [[select_expressions], [group_expressions]]
 	*/
-	function selectColumnsProcess($columns, $indexes) {
+	function selectColumnsProcess(array $columns, array $indexes) {
 		global $driver;
 		$select = array(); // select expressions, empty for *
 		$group = array(); // expressions without aggregation - will be used for GROUP BY if an aggregation function is used
@@ -555,7 +543,7 @@ class Adminer {
 	* @param Index[] $indexes
 	* @return list<string> expressions to join by AND
 	*/
-	function selectSearchProcess($fields, $indexes) {
+	function selectSearchProcess(array $fields, array $indexes) {
 		global $connection, $driver;
 		$return = array();
 		foreach ($indexes as $i => $index) {
@@ -609,7 +597,7 @@ class Adminer {
 	* @param Index[] $indexes
 	* @return list<string> expressions to join by comma
 	*/
-	function selectOrderProcess($fields, $indexes) {
+	function selectOrderProcess(array $fields, array $indexes) {
 		$return = array();
 		foreach ((array) $_GET["order"] as $key => $val) {
 			if ($val != "") {
@@ -640,7 +628,7 @@ class Adminer {
 	* @param ForeignKey[] $foreignKeys
 	* @return bool true if processed, false to process other parts of form
 	*/
-	function selectEmailProcess($where, $foreignKeys) {
+	function selectEmailProcess(array $where, array $foreignKeys) {
 		return false;
 	}
 
@@ -653,17 +641,16 @@ class Adminer {
 	* @param int $page index of page starting at zero
 	* @return string empty string to use default query
 	*/
-	function selectQueryBuild($select, $where, $group, $order, $limit, $page) {
+	function selectQueryBuild(array $select, array $where, array $group, array $order, int $limit, int $page) {
 		return "";
 	}
 
 	/** Query printed after execution in the message
 	* @param string $query executed query
 	* @param string $time elapsed time
-	* @param bool $failed
 	* @return string
 	*/
-	function messageQuery($query, $time, $failed = false) {
+	function messageQuery(string $query, string $time, bool $failed = false) {
 		global $driver;
 		restart_session();
 		$history = &get_session("queries");
@@ -689,20 +676,18 @@ class Adminer {
 	}
 
 	/** Print before edit form
-	* @param string $table
 	* @param Field[] $fields
 	* @param mixed $row
-	* @param bool $update
 	* @return void
 	*/
-	function editRowPrint($table, $fields, $row, $update) {
+	function editRowPrint(string $table, array $fields, $row, bool $update) {
 	}
 
 	/** Functions displayed in edit form
 	* @param Field $field single field from fields()
 	* @return list<string>
 	*/
-	function editFunctions($field) {
+	function editFunctions(array $field) {
 		global $driver;
 		$return = ($field["null"] ? "NULL/" : "");
 		$update = isset($_GET["select"]) || where($_GET);
@@ -728,10 +713,9 @@ class Adminer {
 	* @param string $table table name
 	* @param Field $field single field from fields()
 	* @param string $attrs attributes to use inside the tag
-	* @param string $value
 	* @return string custom input field or empty string for default
 	*/
-	function editInput($table, $field, $attrs, $value) {
+	function editInput(string $table, array $field, string $attrs, string $value) {
 		if ($field["type"] == "enum") {
 			return (isset($_GET["select"]) ? "<label><input type='radio'$attrs value='-1' checked><i>" . lang('original') . "</i></label> " : "")
 				. ($field["null"] ? "<label><input type='radio'$attrs value=''" . ($value !== null || isset($_GET["select"]) ? "" : " checked") . "><i>NULL</i></label> " : "")
@@ -744,20 +728,17 @@ class Adminer {
 	/** Get hint for edit field
 	* @param string $table table name
 	* @param Field $field single field from fields()
-	* @param string $value
 	* @return string
 	*/
-	function editHint($table, $field, $value) {
+	function editHint(string $table, array $field, string $value) {
 		return "";
 	}
 
 	/** Process sent input
 	* @param Field $field single field from fields()
-	* @param string $value
-	* @param string $function
 	* @return string expression to use in a query
 	*/
-	function processInput($field, $value, $function = "") {
+	function processInput(array $field, string $value, string $function = "") {
 		if ($function == "SQL") {
 			return $value; // SQL injection
 		}
@@ -798,19 +779,16 @@ class Adminer {
 	}
 
 	/** Export database structure
-	* @param string $db
 	* @return void prints data
 	*/
-	function dumpDatabase($db) {
+	function dumpDatabase(string $db) {
 	}
 
 	/** Export table structure
-	* @param string $table
-	* @param string $style
 	* @param int $is_view 0 table, 1 view, 2 temporary view table
 	* @return void prints data
 	*/
-	function dumpTable($table, $style, $is_view = 0) {
+	function dumpTable(string $table, string $style, int $is_view = 0) {
 		if ($_POST["format"] != "sql") {
 			echo "\xef\xbb\xbf"; // UTF-8 byte order mark
 			if ($style) {
@@ -840,12 +818,9 @@ class Adminer {
 	}
 
 	/** Export table data
-	* @param string $table
-	* @param string $style
-	* @param string $query
 	* @return void prints data
 	*/
-	function dumpData($table, $style, $query) {
+	function dumpData(string $table, string $style, string $query) {
 		global $connection;
 		if ($style) {
 			$max_packet = (JUSH == "sqlite" ? 0 : 1048576); // default, minimum is 1024
@@ -934,19 +909,16 @@ class Adminer {
 	}
 
 	/** Set export filename
-	* @param string $identifier
 	* @return string filename without extension
 	*/
-	function dumpFilename($identifier) {
+	function dumpFilename(string $identifier) {
 		return friendly_url($identifier != "" ? $identifier : (SERVER != "" ? SERVER : "localhost"));
 	}
 
 	/** Send headers for export
-	* @param string $identifier
-	* @param bool $multi_table
 	* @return string extension
 	*/
-	function dumpHeaders($identifier, $multi_table = false) {
+	function dumpHeaders(string $identifier, bool $multi_table = false) {
 		$output = $_POST["output"];
 		$ext = (preg_match('~sql~', $_POST["format"]) ? "sql" : ($multi_table ? "tar" : "csv")); // multiple CSV packed to TAR
 		header("Content-Type: " .
@@ -994,7 +966,7 @@ class Adminer {
 	* @param string $missing can be "auth" if there is no database connection, "db" if there is no database selected, "ns" with invalid schema
 	* @return void
 	*/
-	function navigation($missing) {
+	function navigation(string $missing) {
 		global $VERSION, $drivers, $connection;
 		echo "<h1>" . $this->name() . " <span class='version'>$VERSION";
 		$new_version = $_COOKIE["adminer_version"];
@@ -1055,7 +1027,7 @@ class Adminer {
 	* @param TableStatus[] $tables result of table_status('', true)
 	* @return void
 	*/
-	function syntaxHighlighting($tables) {
+	function syntaxHighlighting(array $tables) {
 		global $connection;
 		// this is matched by compile.php
 		echo script_src("../externals/jush/modules/jush.js");
@@ -1083,10 +1055,9 @@ class Adminer {
 	}
 
 	/** Print databases list in menu
-	* @param string $missing
 	* @return void
 	*/
-	function databasesPrint($missing) {
+	function databasesPrint(string $missing) {
 		global $adminer, $connection;
 		$databases = $this->databases();
 		if (DB && $databases && !in_array(DB, $databases)) {
@@ -1121,7 +1092,7 @@ class Adminer {
 	* @param TableStatus[] $tables result of table_status('', true)
 	* @return void
 	*/
-	function tablesPrint($tables) {
+	function tablesPrint(array $tables) {
 		echo "<ul id='tables'>" . script("mixin(qs('#tables'), {onmouseover: menuOver, onmouseout: menuOut});");
 		foreach ($tables as $table => $status) {
 			$name = $this->tableName($status);
diff --git a/adminer/include/auth.inc.php b/adminer/include/auth.inc.php
index b2e670d9..dab95da1 100644
--- a/adminer/include/auth.inc.php
+++ b/adminer/include/auth.inc.php
@@ -131,7 +131,7 @@ function unset_permanent() {
 * @param string $error plain text
 * @return never
 */
-function auth_error($error) {
+function auth_error(string $error) {
 	global $adminer, $has_token;
 	$session_name = session_name();
 	if (isset($_GET["username"])) {
diff --git a/adminer/include/db.inc.php b/adminer/include/db.inc.php
index becd34e8..5e3c6177 100644
--- a/adminer/include/db.inc.php
+++ b/adminer/include/db.inc.php
@@ -14,37 +14,29 @@ abstract class SqlDb {
 	/** @var Result|bool */ protected $multi; // used for multiquery
 
 	/** Connect to server
-	* @param string $server
-	* @param string $username
-	* @param string $password
 	* @return bool
 	*/
-	abstract function connect($server, $username, $password);
+	abstract function connect(string $server, string $username, string $password);
 
 	/** Quote string to use in SQL
-	* @param string $string
 	* @return string escaped string enclosed in '
 	*/
-	abstract function quote($string);
+	abstract function quote(string $string);
 
 	/** Select database
-	* @param string $database
 	* @return bool
 	*/
-	abstract function select_db($database);
+	abstract function select_db(string $database);
 
 	/** Send query
-	* @param string $query
-	* @param bool $unbuffered
 	* @return Result|bool
 	*/
-	abstract function query($query, $unbuffered = false);
+	abstract function query(string $query, bool $unbuffered = false);
 
 	/** Send query with more resultsets
-	* @param string $query
 	* @return Result|bool
 	*/
-	function multi_query($query) {
+	function multi_query(string $query) {
 		return $this->multi = $this->query($query);
 	}
 
@@ -63,11 +55,9 @@ abstract class SqlDb {
 	}
 
 	/** Get single field from result
-	* @param string $query
-	* @param int $field
 	* @return string|bool
 	*/
-	function result($query, $field = 0) {
+	function result(string $query, int $field = 0) {
 		$result = $this->query($query);
 		if (!is_object($result)) {
 			return false;
diff --git a/adminer/include/design.inc.php b/adminer/include/design.inc.php
index 50ebc0bf..07f9766c 100644
--- a/adminer/include/design.inc.php
+++ b/adminer/include/design.inc.php
@@ -3,12 +3,11 @@ namespace Adminer;
 
 /** Print HTML header
 * @param string $title used in title, breadcrumb and heading, should be HTML escaped
-* @param string $error
 * @param mixed $breadcrumb ["key" => "link", "key2" => ["link", "desc"]], null for nothing, false for driver only, true for driver and server
 * @param string $title2 used after colon in title and heading, should be HTML escaped
 * @return void
 */
-function page_header($title, $error = "", $breadcrumb = array(), $title2 = "") {
+function page_header(string $title, string $error = "", $breadcrumb = array(), string $title2 = "") {
 	global $LANG, $VERSION, $adminer, $drivers;
 	page_headers();
 	if (is_ajax() && $error) {
@@ -176,10 +175,9 @@ function get_nonce() {
 }
 
 /** Print flash and error messages
-* @param string $error
 * @return void
 */
-function page_messages($error) {
+function page_messages(string $error) {
 	global $adminer;
 	$uri = preg_replace('~^[^?]*~', '', $_SERVER["REQUEST_URI"]);
 	$messages = idx($_SESSION["messages"], $uri);
@@ -199,7 +197,7 @@ function page_messages($error) {
 * @param string $missing "auth", "db", "ns"
 * @return void
 */
-function page_footer($missing = "") {
+function page_footer(string $missing = "") {
 	global $adminer;
 	echo "</div>\n\n<div id='menu'>\n";
 	$adminer->navigation($missing);
diff --git a/adminer/include/driver.inc.php b/adminer/include/driver.inc.php
index 9ef9c0af..a15a6858 100644
--- a/adminer/include/driver.inc.php
+++ b/adminer/include/driver.inc.php
@@ -4,20 +4,17 @@ namespace Adminer;
 $drivers = array();
 
 /** Add a driver
-* @param string $id
-* @param string $name
 * @return void
 */
-function add_driver($id, $name) {
+function add_driver(string $id, string $name) {
 	global $drivers;
 	$drivers[$id] = $name;
 }
 
 /** Get driver name
-* @param string $id
 * @return string
 */
-function get_driver($id) {
+function get_driver(string $id) {
 	global $drivers;
 	return $drivers[$id];
 }
@@ -39,9 +36,8 @@ abstract class SqlDriver {
 	/** @var list<string> */ public $generated = array(); // allowed types of generated columns
 
 	/** Create object for performing database operations
-	* @param Db $connection
 	*/
-	function __construct($connection) {
+	function __construct(Db $connection) {
 		$this->conn = $connection;
 	}
 
@@ -63,18 +59,17 @@ abstract class SqlDriver {
 	* @param Field $field
 	* @return string|void
 	*/
-	function enumLength($field) {
+	function enumLength(array $field) {
 	}
 
 	/** Function used to convert the value inputted by user
 	* @param Field $field
 	* @return string|void
 	*/
-	function unconvertFunction($field) {
+	function unconvertFunction(array $field) {
 	}
 
 	/** Select data from table
-	* @param string $table
 	* @param list<string> $select result of $adminer->selectColumnsProcess()[0]
 	* @param list<string> $where result of $adminer->selectSearchProcess()
 	* @param list<string> $group result of $adminer->selectColumnsProcess()[1]
@@ -84,7 +79,7 @@ abstract class SqlDriver {
 	* @param bool $print whether to print the query
 	* @return Result|false
 	*/
-	function select($table, $select, $where, $group, $order = array(), $limit = 1, $page = 0, $print = false) {
+	function select(string $table, array $select, array $where, array $group, array $order = array(), $limit = 1, int $page = 0, bool $print = false) {
 		global $adminer;
 		$is_group = (count($group) < count($select));
 		$query = $adminer->selectQueryBuild($select, $where, $group, $order, $limit, $page);
@@ -106,25 +101,22 @@ abstract class SqlDriver {
 	}
 
 	/** Delete data from table
-	* @param string $table
 	* @param string $queryWhere " WHERE ..."
 	* @param int $limit 0 or 1
 	* @return Result|bool
 	*/
-	function delete($table, $queryWhere, $limit = 0) {
+	function delete(string $table, string $queryWhere, int $limit = 0) {
 		$query = "FROM " . table($table);
 		return queries("DELETE" . ($limit ? limit1($table, $query, $queryWhere) : " $query$queryWhere"));
 	}
 
 	/** Update data in table
-	* @param string $table
 	* @param string[] $set escaped columns in keys, quoted data in values
 	* @param string $queryWhere " WHERE ..."
 	* @param int $limit 0 or 1
-	* @param string $separator
 	* @return Result|bool
 	*/
-	function update($table, $set, $queryWhere, $limit = 0, $separator = "\n") {
+	function update(string $table, array $set, string $queryWhere, int $limit = 0, string $separator = "\n") {
 		$values = array();
 		foreach ($set as $key => $val) {
 			$values[] = "$key = $val";
@@ -134,11 +126,10 @@ abstract class SqlDriver {
 	}
 
 	/** Insert data into table
-	* @param string $table
 	* @param string[] $set escaped columns in keys, quoted data in values
 	* @return Result|bool
 	*/
-	function insert($table, $set) {
+	function insert(string $table, array $set) {
 		return queries("INSERT INTO " . table($table) . ($set
 			? " (" . implode(", ", array_keys($set)) . ")\nVALUES (" . implode(", ", $set) . ")"
 			: " DEFAULT VALUES"
@@ -146,20 +137,18 @@ abstract class SqlDriver {
 	}
 
 	/** Get RETURNING clause for INSERT queries (PostgreSQL specific)
-	* @param string $table
 	* @return string
 	*/
-	function insertReturning($table) {
+	function insertReturning(string $table) {
 		return "";
 	}
 
 	/** Insert or update data in table
-	* @param string $table
 	* @param list<string[]> $rows of arrays with escaped columns in keys and quoted data in values
 	* @param int[] $primary column names in keys
 	* @return Result|bool
 	*/
-	function insertUpdate($table, $rows, $primary) {
+	function insertUpdate(string $table, array $rows, array $primary) {
 		return false;
 	}
 
@@ -185,11 +174,10 @@ abstract class SqlDriver {
 	}
 
 	/** Return query with a timeout
-	* @param string $query
 	* @param int $timeout seconds
 	* @return string|void null if the driver doesn't support query timeouts
 	*/
-	function slowQuery($query, $timeout) {
+	function slowQuery(string $query, int $timeout) {
 	}
 
 	/** Convert column to be searchable
@@ -198,24 +186,22 @@ abstract class SqlDriver {
 	* @param Field $field
 	* @return string
 	*/
-	function convertSearch($idf, $val, $field) {
+	function convertSearch(string $idf, array $val, array $field) {
 		return $idf;
 	}
 
 	/** Convert operator so it can be used in search
-	* @param string $operator
 	* @return string
 	*/
-	function convertOperator($operator) {
+	function convertOperator(string $operator) {
 		return $operator;
 	}
 
 	/** Convert value returned by database to actual value
-	* @param string $val
 	* @param Field $field
 	* @return string
 	*/
-	function value($val, $field) {
+	function value(string $val, array $field) {
 		return (method_exists($this->conn, 'value')
 			? $this->conn->value($val, $field)
 			: (is_resource($val) ? stream_get_contents($val) : $val)
@@ -223,10 +209,9 @@ abstract class SqlDriver {
 	}
 
 	/** Quote binary string
-	* @param string $s
 	* @return string
 	*/
-	function quoteBinary($s) {
+	function quoteBinary(string $s) {
 		return q($s);
 	}
 
@@ -237,11 +222,9 @@ abstract class SqlDriver {
 	}
 
 	/** Get help link for table
-	* @param string $name
-	* @param bool $is_view
 	* @return string|void relative URL
 	*/
-	function tableHelp($name, $is_view = false) {
+	function tableHelp(string $name, bool $is_view = false) {
 	}
 
 	/** Check if C-style escapes are supported
@@ -262,15 +245,14 @@ abstract class SqlDriver {
 	* @param TableStatus $table_status result of table_status1()
 	* @return bool
 	*/
-	function supportsIndex($table_status) {
+	function supportsIndex(array $table_status) {
 		return !is_view($table_status);
 	}
 
 	/** Get defined check constraints
-	* @param string $table
 	* @return string[] [$name => $clause]
 	*/
-	function checkConstraints($table) {
+	function checkConstraints(string $table) {
 		// MariaDB contains CHECK_CONSTRAINTS.TABLE_NAME, MySQL and PostrgreSQL not
 		return get_key_vals("SELECT c.CONSTRAINT_NAME, CHECK_CLAUSE
 FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS c
diff --git a/adminer/include/editing.inc.php b/adminer/include/editing.inc.php
index 5205e509..a65c85e5 100644
--- a/adminer/include/editing.inc.php
+++ b/adminer/include/editing.inc.php
@@ -7,10 +7,9 @@ namespace Adminer;
 * @param Result $result
 * @param Db $connection2 connection to examine indexes
 * @param string[] $orgtables
-* @param int $limit
 * @return string[] $orgtables
 */
-function select($result, $connection2 = null, $orgtables = array(), $limit = 0) {
+function select($result, Db $connection2 = null, array $orgtables = array(), int $limit = 0) {
 	$links = array(); // colno => orgtable - create links from these columns
 	$indexes = array(); // orgtable => array(column => colno) - primary keys
 	$columns = array(); // orgtable => array(column => ) - not selected columns in primary key
@@ -101,10 +100,9 @@ function select($result, $connection2 = null, $orgtables = array(), $limit = 0)
 }
 
 /** Get referencable tables with single column primary key except self
-* @param string $self
 * @return array<string, Field> [$table_name => $field]
 */
-function referencable_primary($self) {
+function referencable_primary(string $self) {
 	$return = array(); // table_name => field
 	foreach (table_status('', true) as $table_name => $table) {
 		if ($table_name != $self && fk_support($table)) {
@@ -123,13 +121,10 @@ function referencable_primary($self) {
 }
 
 /** Print SQL <textarea> tag
-* @param string $name
 * @param string|list<array{string}> $value
-* @param int $rows
-* @param int $cols
 * @return void
 */
-function textarea($name, $value, $rows = 10, $cols = 80) {
+function textarea(string $name, $value, int $rows = 10, int $cols = 80) {
 	echo "<textarea name='" . h($name) . "' rows='$rows' cols='$cols' class='sqlarea jush-" . JUSH . "' spellcheck='false' wrap='off'>";
 	if (is_array($value)) {
 		foreach ($value as $val) { // not implode() to save memory
@@ -142,14 +137,10 @@ function textarea($name, $value, $rows = 10, $cols = 80) {
 }
 
 /** Generate HTML <select> or <input> if $options are empty
-* @param string $attrs
 * @param string[] $options
-* @param string $value
-* @param string $onchange
-* @param string $placeholder
 * @return string
 */
-function select_input($attrs, $options, $value = "", $onchange = "", $placeholder = "") {
+function select_input(string $attrs, array $options, string $value = "", string $onchange = "", string $placeholder = "") {
 	$tag = ($options ? "select" : "input");
 	return "<$tag$attrs" . ($options
 		? "><option value=''>$placeholder" . optionlist($options, $value, true) . "</select>"
@@ -162,7 +153,7 @@ function select_input($attrs, $options, $value = "", $onchange = "", $placeholde
 * @param string|int $val
 * @return void
 */
-function json_row($key, $val = null) {
+function json_row(string $key, $val = null) {
 	static $first = true;
 	if ($first) {
 		echo "{";
@@ -177,14 +168,13 @@ function json_row($key, $val = null) {
 }
 
 /** Print table columns for type edit
-* @param string $key
 * @param Field $field
 * @param list<string> $collations
 * @param string[] $foreign_keys
 * @param list<string> $extra_types extra types to prepend
 * @return void
 */
-function edit_type($key, $field, $collations, $foreign_keys = array(), $extra_types = array()) {
+function edit_type(string $key, array $field, array $collations, array $foreign_keys = array(), array $extra_types = array()) {
 	global $driver;
 	$type = $field["type"];
 	echo "<td><select name='" . h($key) . "[type]' class='type' aria-labelledby='label-type'>";
@@ -217,10 +207,9 @@ function edit_type($key, $field, $collations, $foreign_keys = array(), $extra_ty
 }
 
 /** Get partition info
-* @param string $table
 * @return array{partition_by:string, partition:string, partitions:string, partition_names:list<string>, partition_values:list<string>}
 */
-function get_partitions_info($table) {
+function get_partitions_info(string $table) {
 	global $connection;
 	$from = "FROM information_schema.PARTITIONS WHERE TABLE_SCHEMA = " . q(DB) . " AND TABLE_NAME = " . q($table);
 	$result = $connection->query("SELECT PARTITION_METHOD, PARTITION_EXPRESSION, PARTITION_ORDINAL_POSITION $from ORDER BY PARTITION_ORDINAL_POSITION DESC LIMIT 1");
@@ -233,10 +222,9 @@ function get_partitions_info($table) {
 }
 
 /** Filter length value including enums
-* @param string $length
 * @return string
 */
-function process_length($length) {
+function process_length(string $length) {
 	global $driver;
 	$enum_length = $driver->enumLength;
 	return (preg_match("~^\\s*\\(?\\s*$enum_length(?:\\s*,\\s*$enum_length)*+\\s*\\)?\\s*\$~", $length) && preg_match_all("~$enum_length~", $length, $matches)
@@ -247,10 +235,9 @@ function process_length($length) {
 
 /** Create SQL string from field type
 * @param FieldType $field
-* @param string $collate
 * @return string
 */
-function process_type($field, $collate = "COLLATE") {
+function process_type(array $field, string $collate = "COLLATE") {
 	global $driver;
 	return " $field[type]"
 		. process_length($field["length"])
@@ -264,7 +251,7 @@ function process_type($field, $collate = "COLLATE") {
 * @param Field $type_field information about field type
 * @return list<string> ["field", "type", "NULL", "DEFAULT", "ON UPDATE", "COMMENT", "AUTO_INCREMENT"]
 */
-function process_field($field, $type_field) {
+function process_field(array $field, array $type_field) {
 	// MariaDB exports CURRENT_TIMESTAMP as a function.
 	if ($field["on_update"]) {
 		$field["on_update"] = str_ireplace("current_timestamp()", "CURRENT_TIMESTAMP", $field["on_update"]);
@@ -284,7 +271,7 @@ function process_field($field, $type_field) {
 * @param Field $field
 * @return string
 */
-function default_value($field) {
+function default_value(array $field) {
 	global $driver;
 	$default = $field["default"];
 	$generated = $field["generated"];
@@ -298,10 +285,9 @@ function default_value($field) {
 }
 
 /** Get type class to use in CSS
-* @param string $type
 * @return string|void class=''
 */
-function type_class($type) {
+function type_class(string $type) {
 	foreach (
 		array(
 			'char' => 'text',
@@ -323,7 +309,7 @@ function type_class($type) {
 * @param string[] $foreign_keys
 * @return void
 */
-function edit_fields($fields, $collations, $type = "TABLE", $foreign_keys = array()) {
+function edit_fields(array $fields, array $collations, $type = "TABLE", array $foreign_keys = array()) {
 	global $driver;
 	$fields = array_values($fields);
 	$default_class = (($_POST ? $_POST["defaults"] : get_setting("defaults")) ? "" : " class='hidden'");
@@ -385,7 +371,7 @@ function edit_fields($fields, $collations, $type = "TABLE", $foreign_keys = arra
 * @param Field[] $fields
 * @return bool
 */
-function process_fields(&$fields) {
+function process_fields(&array $fields) {
 	$offset = 0;
 	if ($_POST["up"]) {
 		$last = 0;
@@ -426,7 +412,7 @@ function process_fields(&$fields) {
 * @param list<string> $match
 * @return string
 */
-function normalize_enum($match) {
+function normalize_enum(array $match) {
 	$val = $match[0];
 	return "'" . str_replace("'", "''", addcslashes(stripcslashes(str_replace($val[0] . $val[0], $val[0], substr($val, 1, -1))), '\\')) . "'";
 }
@@ -434,11 +420,9 @@ function normalize_enum($match) {
 /** Issue grant or revoke commands
 * @param string $grant GRANT or REVOKE
 * @param list<string> $privileges
-* @param string $columns
-* @param string $on
 * @return Result|bool
 */
-function grant($grant, $privileges, $columns, $on) {
+function grant(string $grant, array $privileges, string $columns, string $on) {
 	if (!$privileges) {
 		return true;
 	}
@@ -458,15 +442,9 @@ function grant($grant, $privileges, $columns, $on) {
 * @param string $drop_created drop new object query
 * @param string $test create test object query
 * @param string $drop_test drop test object query
-* @param string $location
-* @param string $message_drop
-* @param string $message_alter
-* @param string $message_create
-* @param string $old_name
-* @param string $new_name
 * @return void redirect on success
 */
-function drop_create($drop, $create, $drop_created, $test, $drop_test, $location, $message_drop, $message_alter, $message_create, $old_name, $new_name) {
+function drop_create(string $drop, string $create, string $drop_created, string $test, string $drop_test, string $location, string $message_drop, string $message_alter, string $message_create, string $old_name, string $new_name) {
 	if ($_POST["drop"]) {
 		query_redirect($drop, $location, $message_drop);
 	} elseif ($old_name == "") {
@@ -487,11 +465,10 @@ function drop_create($drop, $create, $drop_created, $test, $drop_test, $location
 }
 
 /** Generate SQL query for creating trigger
-* @param string $on
 * @param Trigger $row result of trigger()
 * @return string
 */
-function create_trigger($on, $row) {
+function create_trigger(string $on, array $row) {
 	$timing_event = " $row[Timing] $row[Event]" . (preg_match('~ OF~', $row["Event"]) ? " $row[Of]" : ""); // SQL injection
 	return "CREATE TRIGGER "
 		. idf_escape($row["Trigger"])
@@ -506,7 +483,7 @@ function create_trigger($on, $row) {
 * @param Routine $row result of routine()
 * @return string
 */
-function create_routine($routine, $row) {
+function create_routine($routine, array $row) {
 	global $driver;
 	$set = array();
 	$fields = (array) $row["fields"];
@@ -527,10 +504,9 @@ function create_routine($routine, $row) {
 }
 
 /** Remove current user definer from SQL command
-* @param string $query
 * @return string
 */
-function remove_definer($query) {
+function remove_definer(string $query) {
 	return preg_replace('~^([A-Z =]+) DEFINER=`' . preg_replace('~@(.*)~', '`@`(%|\1)', logged_user()) . '`~', '\1', $query); //! proper escaping of user
 }
 
@@ -538,7 +514,7 @@ function remove_definer($query) {
 * @param ForeignKey $foreign_key
 * @return string
 */
-function format_foreign_key($foreign_key) {
+function format_foreign_key(array $foreign_key) {
 	global $driver;
 	$db = $foreign_key["db"];
 	$ns = $foreign_key["ns"];
@@ -553,11 +529,10 @@ function format_foreign_key($foreign_key) {
 }
 
 /** Add a file to TAR
-* @param string $filename
 * @param TmpFile $tmp_file
 * @return void prints the output
 */
-function tar_file($filename, $tmp_file) {
+function tar_file(string $filename, $tmp_file) {
 	$return = pack("a100a8a8a8a12a12", $filename, 644, 0, 0, decoct($tmp_file->size), decoct(time()));
 	$checksum = 8*32; // space for checksum itself
 	for ($i=0; $i < strlen($return); $i++) {
@@ -571,10 +546,9 @@ function tar_file($filename, $tmp_file) {
 }
 
 /** Get INI bytes value
-* @param string $ini
 * @return int
 */
-function ini_bytes($ini) {
+function ini_bytes(string $ini) {
 	$val = ini_get($ini);
 	switch (strtolower(substr($val, -1))) {
 		case 'g':
@@ -592,7 +566,7 @@ function ini_bytes($ini) {
 * @param string $text HTML code
 * @return string HTML code
 */
-function doc_link($paths, $text = "<sup>?</sup>") {
+function doc_link(array $paths, string $text = "<sup>?</sup>") {
 	global $connection;
 	$server_info = $connection->server_info;
 	$version = preg_replace('~^(\d\.?\d).*~s', '\1', $server_info); // two most significant digits
@@ -611,10 +585,9 @@ function doc_link($paths, $text = "<sup>?</sup>") {
 }
 
 /** Compute size of database
-* @param string $db
 * @return string formatted
 */
-function db_size($db) {
+function db_size(string $db) {
 	global $connection;
 	if (!$connection->select_db($db)) {
 		return "?";
@@ -627,10 +600,9 @@ function db_size($db) {
 }
 
 /** Print SET NAMES if utf8mb4 might be needed
-* @param string $create
 * @return void
 */
-function set_utf8mb4($create) {
+function set_utf8mb4(string $create) {
 	global $connection;
 	static $set = false;
 	if (!$set && preg_match('~\butf8mb4~i', $create)) { // possible false positive
diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index 1f4b0b70..5a509b7d 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -40,7 +40,7 @@ function version() {
 * @param string $idf text inside ``
 * @return string
 */
-function idf_unescape($idf) {
+function idf_unescape(string $idf) {
 	if (!preg_match('~^[`\'"[]~', $idf)) {
 		return $idf;
 	}
@@ -49,19 +49,17 @@ function idf_unescape($idf) {
 }
 
 /** Shortcut for $connection->quote($string)
-* @param string $string
 * @return string
 */
-function q($string) {
+function q(string $string) {
 	global $connection;
 	return $connection->quote($string);
 }
 
 /** Escape string to use inside ''
-* @param string $val
 * @return string
 */
-function escape_string($val) {
+function escape_string(string $val) {
 	return substr(q($val), 1, -1);
 }
 
@@ -72,15 +70,14 @@ function escape_string($val) {
 * @param mixed $default
 * @return mixed
 */
-function idx($array, $key, $default = null) {
+function idx(?array $array, $key, $default = null) {
 	return ($array && array_key_exists($key, $array) ? $array[$key] : $default);
 }
 
 /** Remove non-digits from a string
-* @param string $val
 * @return string
 */
-function number($val) {
+function number(string $val) {
 	return preg_replace('~[^0-9]+~', '', $val);
 }
 
@@ -96,7 +93,7 @@ function number_type() {
 * @param bool $filter whether to leave values as is
 * @return void modified in place
 */
-function remove_slashes($process, $filter = false) {
+function remove_slashes(array $process, bool $filter = false) {
 	if (function_exists("get_magic_quotes_gpc") && get_magic_quotes_gpc()) {
 		while (list($key, $val) = each($process)) {
 			foreach ($val as $k => $v) {
@@ -113,11 +110,9 @@ function remove_slashes($process, $filter = false) {
 }
 
 /** Escape or unescape string to use inside form []
-* @param string $idf
-* @param bool $back
 * @return string
 */
-function bracket_escape($idf, $back = false) {
+function bracket_escape(string $idf, bool $back = false) {
 	// escape brackets inside name="x[]"
 	static $trans = array(':' => ':1', ']' => ':2', '[' => ':3', '"' => ':4');
 	return strtr($idf, ($back ? array_flip($trans) : $trans));
@@ -129,7 +124,7 @@ function bracket_escape($idf, $back = false) {
 * @param Db $connection2 defaults to $connection
 * @return bool
 */
-function min_version($version, $maria_db = "", $connection2 = null) {
+function min_version($version, $maria_db = "", Db $connection2 = null) {
 	global $connection;
 	if (!$connection2) {
 		$connection2 = $connection;
@@ -143,18 +138,16 @@ function min_version($version, $maria_db = "", $connection2 = null) {
 }
 
 /** Get connection charset
-* @param Db $connection
 * @return string
 */
-function charset($connection) {
+function charset(Db $connection) {
 	return (min_version("5.5.3", 0, $connection) ? "utf8mb4" : "utf8"); // SHOW CHARSET would require an extra query
 }
 
 /** Get INI boolean value
-* @param string $ini
 * @return bool
 */
-function ini_bool($ini) {
+function ini_bool(string $ini) {
 	$val = ini_get($ini);
 	return (preg_match('~^(on|true|yes)$~i', $val) || (int) $val); // boolean values set by php_value are strings
 }
@@ -171,13 +164,9 @@ function sid() {
 }
 
 /** Set password to session
-* @param string $vendor
-* @param string $server
-* @param string $username
-* @param ?string $password
 * @return void
 */
-function set_password($vendor, $server, $username, $password) {
+function set_password(string $vendor, string $server, string $username, ?string $password) {
 	$_SESSION["pwds"][$vendor][$server][$username] = ($_COOKIE["adminer_key"] && is_string($password)
 		? array(encrypt_string($password, $_COOKIE["adminer_key"]))
 		: $password
@@ -199,21 +188,18 @@ function get_password() {
 }
 
 /** Get single value from database
-* @param string $query
-* @param int $field
 * @return string or false if error
 */
-function get_val($query, $field = 0) {
+function get_val(string $query, int $field = 0) {
 	global $connection;
 	return $connection->result($query, $field);
 }
 
 /** Get list of values from database
-* @param string $query
 * @param mixed $column
 * @return list<string>
 */
-function get_vals($query, $column = 0) {
+function get_vals(string $query, $column = 0) {
 	global $connection;
 	$return = array();
 	$result = $connection->query($query);
@@ -226,12 +212,9 @@ function get_vals($query, $column = 0) {
 }
 
 /** Get keys from first column and values from second
-* @param string $query
-* @param Db $connection2
-* @param bool $set_keys
 * @return string[]
 */
-function get_key_vals($query, $connection2 = null, $set_keys = true) {
+function get_key_vals(string $query, Db $connection2 = null, bool $set_keys = true) {
 	global $connection;
 	if (!is_object($connection2)) {
 		$connection2 = $connection;
@@ -251,12 +234,9 @@ function get_key_vals($query, $connection2 = null, $set_keys = true) {
 }
 
 /** Get all rows of result
-* @param string $query
-* @param Db $connection2
-* @param string $error
 * @return list<string[]> of associative arrays
 */
-function get_rows($query, $connection2 = null, $error = "<p class='error'>") {
+function get_rows(string $query, Db $connection2 = null, string $error = "<p class='error'>") {
 	global $connection;
 	$conn = (is_object($connection2) ? $connection2 : $connection);
 	$return = array();
@@ -276,7 +256,7 @@ function get_rows($query, $connection2 = null, $error = "<p class='error'>") {
 * @param Index[] $indexes result of indexes()
 * @return string[]|void null if there is no unique identifier
 */
-function unique_array($row, $indexes) {
+function unique_array(array $row, array $indexes) {
 	foreach ($indexes as $index) {
 		if (preg_match("~PRIMARY|UNIQUE~", $index["type"])) {
 			$return = array();
@@ -292,10 +272,9 @@ function unique_array($row, $indexes) {
 }
 
 /** Escape column key used in where()
-* @param string $key
 * @return string
 */
-function escape_key($key) {
+function escape_key(string $key) {
 	if (preg_match('(^([\w(]+)(' . str_replace("_", ".*", preg_quote(idf_escape("_"))) . ')([ \w)]+)$)', $key, $match)) { //! columns looking like functions
 		return $match[1] . idf_escape(idf_unescape($match[2])) . $match[3]; //! SQL injection
 	}
@@ -307,7 +286,7 @@ function escape_key($key) {
 * @param Field[] $fields
 * @return string
 */
-function where($where, $fields = array()) {
+function where(array $where, array $fields = array()) {
 	global $connection;
 	$return = array();
 	foreach ((array) $where["where"] as $key => $val) {
@@ -332,11 +311,10 @@ function where($where, $fields = array()) {
 }
 
 /** Create SQL condition from query string
-* @param string $val
 * @param Field[] $fields
 * @return string
 */
-function where_check($val, $fields = array()) {
+function where_check(string $val, array $fields = array()) {
 	parse_str($val, $check);
 	remove_slashes(array(&$check));
 	return where($check, $fields);
@@ -345,11 +323,9 @@ function where_check($val, $fields = array()) {
 /** Create query string where condition from value
 * @param int $i condition order
 * @param string $column column identifier
-* @param string $value
-* @param string $operator
 * @return string
 */
-function where_link($i, $column, $value, $operator = "=") {
+function where_link(int $i, string $column, string $value, string $operator = "=") {
 	return "&where%5B$i%5D%5Bcol%5D=" . urlencode($column) . "&where%5B$i%5D%5Bop%5D=" . urlencode(($value !== null ? $operator : "IS NULL")) . "&where%5B$i%5D%5Bval%5D=" . urlencode($value);
 }
 
@@ -359,7 +335,7 @@ function where_link($i, $column, $value, $operator = "=") {
 * @param list<string> $select
 * @return string
 */
-function convert_fields($columns, $fields, $select = array()) {
+function convert_fields(array $columns, array $fields, array $select = array()) {
 	$return = "";
 	foreach ($columns as $key => $val) {
 		if ($select && !in_array(idf_escape($key), $select)) {
@@ -374,12 +350,10 @@ function convert_fields($columns, $fields, $select = array()) {
 }
 
 /** Set cookie valid on current path
-* @param string $name
-* @param string $value
 * @param int $lifetime number of seconds, 0 for session cookie, 2592000 - 30 days
 * @return void
 */
-function cookie($name, $value, $lifetime = 2592000) {
+function cookie(string $name, string $value, int $lifetime = 2592000) {
 	global $HTTPS;
 	header(
 		"Set-Cookie: $name=" . urlencode($value)
@@ -392,30 +366,26 @@ function cookie($name, $value, $lifetime = 2592000) {
 }
 
 /** Get settings stored in a cookie
-* @param string $cookie
 * @return mixed[]
 */
-function get_settings($cookie) {
+function get_settings(string $cookie) {
 	parse_str($_COOKIE[$cookie], $settings);
 	return $settings;
 }
 
 /** Get setting stored in a cookie
-* @param string $key
-* @param string $cookie
 * @return mixed
 */
-function get_setting($key, $cookie = "adminer_settings") {
+function get_setting(string $key, string $cookie = "adminer_settings") {
 	$settings = get_settings($cookie);
 	return $settings[$key];
 }
 
 /** Store settings to a cookie
 * @param mixed[] $settings
-* @param string $cookie
 * @return void
 */
-function save_settings($settings, $cookie = "adminer_settings") {
+function save_settings(array $settings, string $cookie = "adminer_settings") {
 	cookie($cookie, http_build_query($settings + get_settings($cookie)));
 }
 
@@ -429,10 +399,9 @@ function restart_session() {
 }
 
 /** Stop session if possible
-* @param bool $force
 * @return void
 */
-function stop_session($force = false) {
+function stop_session(bool $force = false) {
 	$use_cookies = ini_bool("session.use_cookies");
 	if (!$use_cookies || $force) {
 		session_write_close(); // improves concurrency if a user opens several pages at once, may be restarted later
@@ -443,30 +412,24 @@ function stop_session($force = false) {
 }
 
 /** Get session variable for current server
-* @param string $key
 * @return mixed
 */
-function &get_session($key) {
+function &get_session(string $key) {
 	return $_SESSION[$key][DRIVER][SERVER][$_GET["username"]];
 }
 
 /** Set session variable for current server
-* @param string $key
 * @param mixed $val
 * @return mixed
 */
-function set_session($key, $val) {
+function set_session(string $key, $val) {
 	$_SESSION[$key][DRIVER][SERVER][$_GET["username"]] = $val; // used also in auth.inc.php
 }
 
 /** Get authenticated URL
-* @param string $vendor
-* @param string $server
-* @param string $username
-* @param string $db
 * @return string
 */
-function auth_url($vendor, $server, $username, $db = null) {
+function auth_url(string $vendor, string $server, string $username, string $db = null) {
 	global $drivers;
 	$uri = remove_from_uri(implode("|", array_keys($drivers))
 		. "|username|ext|"
@@ -494,10 +457,9 @@ function is_ajax() {
 
 /** Send Location header and exit
 * @param string $location null to only set a message
-* @param string $message
 * @return void
 */
-function redirect($location, $message = null) {
+function redirect(string $location, string $message = null) {
 	if ($message !== null) {
 		restart_session();
 		$_SESSION["messages"][preg_replace('~^[^?]*~', '', ($location !== null ? $location : $_SERVER["REQUEST_URI"]))][] = $message;
@@ -512,16 +474,9 @@ function redirect($location, $message = null) {
 }
 
 /** Execute query and redirect if successful
-* @param string $query
-* @param string $location
-* @param string $message
-* @param bool $redirect
-* @param bool $execute
-* @param bool $failed
-* @param string $time
 * @return bool
 */
-function query_redirect($query, $location, $message, $redirect = true, $execute = true, $failed = false, $time = "") {
+function query_redirect(string $query, string $location, string $message, bool $redirect = true, bool $execute = true, bool $failed = false, string $time = "") {
 	global $connection, $error, $adminer;
 	if ($execute) {
 		$start = microtime(true);
@@ -551,7 +506,7 @@ class Queries {
 * @param string $query end with ';' to use DELIMITER
 * @return Result|bool
 */
-function queries($query) {
+function queries(string $query) {
 	global $connection;
 	if (!Queries::$start) {
 		Queries::$start = microtime(true);
@@ -561,12 +516,11 @@ function queries($query) {
 }
 
 /** Apply command to all array items
-* @param string $query
 * @param list<string> $tables
 * @param callable(string):string $escape
 * @return bool
 */
-function apply_queries($query, $tables, $escape = 'Adminer\table') {
+function apply_queries(string $query, array $tables, callable $escape = 'Adminer\table') {
 	foreach ($tables as $table) {
 		if (!queries("$query " . $escape($table))) {
 			return false;
@@ -576,12 +530,9 @@ function apply_queries($query, $tables, $escape = 'Adminer\table') {
 }
 
 /** Redirect by remembered queries
-* @param string $location
-* @param string $message
-* @param bool $redirect
 * @return bool
 */
-function queries_redirect($location, $message, $redirect) {
+function queries_redirect(string $location, string $message, bool $redirect) {
 	$queries = implode("\n", Queries::$queries);
 	$time = format_time(Queries::$start);
 	return query_redirect($queries, $location, $message, $redirect, false, !$redirect, $time);
@@ -591,7 +542,7 @@ function queries_redirect($location, $message, $redirect) {
 * @param float $start output of microtime(true)
 * @return string HTML code
 */
-function format_time($start) {
+function format_time(float $start) {
 	return lang('%.3f s', max(0, microtime(true) - $start));
 }
 
@@ -603,20 +554,16 @@ function relative_uri() {
 }
 
 /** Remove parameter from query string
-* @param string $param
 * @return string
 */
-function remove_from_uri($param = "") {
+function remove_from_uri(string $param = "") {
 	return substr(preg_replace("~(?<=[?&])($param" . (SID ? "" : "|" . session_name()) . ")=[^&]*&~", '', relative_uri() . "&"), 0, -1);
 }
 
 /** Get file contents from $_FILES
-* @param string $key
-* @param bool $decompress
-* @param string $delimiter
 * @return mixed int for error, string otherwise
 */
-function get_file($key, $decompress = false, $delimiter = "") {
+function get_file(string $key, bool $decompress = false, string $delimiter = "") {
 	$file = $_FILES[$key];
 	if (!$file) {
 		return null;
@@ -653,40 +600,33 @@ function get_file($key, $decompress = false, $delimiter = "") {
 }
 
 /** Determine upload error
-* @param int $error
 * @return string
 */
-function upload_error($error) {
+function upload_error(int $error) {
 	$max_size = ($error == UPLOAD_ERR_INI_SIZE ? ini_get("upload_max_filesize") : 0); // post_max_size is checked in index.php
 	return ($error ? lang('Unable to upload a file.') . ($max_size ? " " . lang('Maximum allowed file size is %sB.', $max_size) : "") : lang('File does not exist.'));
 }
 
 /** Create repeat pattern for preg
-* @param string $pattern
-* @param int $length
 * @return string
 */
-function repeat_pattern($pattern, $length) {
+function repeat_pattern(string $pattern, int $length) {
 	// fix for Compilation failed: number too big in {} quantifier
 	return str_repeat("$pattern{0,65535}", $length / 65535) . "$pattern{0," . ($length % 65535) . "}"; // can create {0,0} which is OK
 }
 
 /** Check whether the string is in UTF-8
-* @param string $val
 * @return bool
 */
-function is_utf8($val) {
+function is_utf8(string $val) {
 	// don't print control chars except \t\r\n
 	return (preg_match('~~u', $val) && !preg_match('~[\0-\x8\xB\xC\xE-\x1F]~', $val));
 }
 
 /** Shorten UTF-8 string
-* @param string $string
-* @param int $length
-* @param string $suffix
 * @return string escaped string with appended ...
 */
-function shorten_utf8($string, $length = 80, $suffix = "") {
+function shorten_utf8(string $string, int $length = 80, string $suffix = "") {
 	if (!preg_match("(^(" . repeat_pattern("[\t\r\n -\x{10FFFF}]", $length) . ")($)?)u", $string, $match)) { // ~s causes trash in $match[2] under some PHP versions, (.|\n) is slow
 		preg_match("(^(" . repeat_pattern("[\t\r\n -~]", $length) . ")($)?)", $string, $match);
 	}
@@ -702,29 +642,25 @@ function format_number($val) {
 }
 
 /** Generate friendly URL
-* @param string $val
 * @return string
 */
-function friendly_url($val) {
+function friendly_url(string $val) {
 	// used for blobs and export
 	return preg_replace('~\W~i', '-', $val);
 }
 
 /** Get status of a single table and fall back to name on error
-* @param string $table
-* @param bool $fast
 * @return TableStatus one element from table_status()
 */
-function table_status1($table, $fast = false) {
+function table_status1(string $table, bool $fast = false) {
 	$return = table_status($table, $fast);
 	return ($return ? reset($return) : array("Name" => $table));
 }
 
 /** Find out foreign keys for each column
-* @param string $table
 * @return list<ForeignKey>[] [$col => []]
 */
-function column_foreign_keys($table) {
+function column_foreign_keys(string $table) {
 	global $adminer;
 	$return = array();
 	foreach ($adminer->foreignKeys($table) as $foreign_key) {
@@ -761,11 +697,9 @@ function fields_from_edit() { // used by Mongo and SimpleDB
 }
 
 /** Send headers for export
-* @param string $identifier
-* @param bool $multi_table
 * @return string extension
 */
-function dump_headers($identifier, $multi_table = false) {
+function dump_headers(string $identifier, bool $multi_table = false) {
 	global $adminer;
 	$return = $adminer->dumpHeaders($identifier, $multi_table);
 	$output = $_POST["output"];
@@ -785,7 +719,7 @@ function dump_headers($identifier, $multi_table = false) {
 * @param string[] $row
 * @return void
 */
-function dump_csv($row) {
+function dump_csv(array $row) {
 	foreach ($row as $key => $val) {
 		if (preg_match('~["\n,;\t]|^0|\.\d*0$~', $val) || $val === "") {
 			$row[$key] = '"' . str_replace('"', '""', $val) . '"';
@@ -795,11 +729,10 @@ function dump_csv($row) {
 }
 
 /** Apply SQL function
-* @param string $function
 * @param string $column escaped column identifier
 * @return string
 */
-function apply_sql_function($function, $column) {
+function apply_sql_function(string $function, string $column) {
 	return ($function ? ($function == "unixepoch" ? "DATETIME($column, '$function')" : ($function == "count distinct" ? "COUNT(DISTINCT " : strtoupper("$function(")) . "$column)") : $column);
 }
 
@@ -824,10 +757,9 @@ function get_temp_dir() {
 }
 
 /** Open and exclusively lock a file
-* @param string $filename
 * @return resource|void null for error
 */
-function file_open_lock($filename) {
+function file_open_lock(string $filename) {
 	if (is_link($filename)) {
 		return; // https://cwe.mitre.org/data/definitions/61.html
 	}
@@ -844,11 +776,9 @@ function file_open_lock($filename) {
 }
 
 /** Write and unlock a file
-* @param resource $fp
-* @param string $data
 * @return void
 */
-function file_write_unlock($fp, $data) {
+function file_write_unlock(resource $fp, string $data) {
 	rewind($fp);
 	fwrite($fp, $data);
 	ftruncate($fp, strlen($data));
@@ -856,10 +786,9 @@ function file_write_unlock($fp, $data) {
 }
 
 /** Unlock and close a file
-* @param resource $fp
 * @return void
 */
-function file_unlock($fp) {
+function file_unlock(resource $fp) {
 	flock($fp, LOCK_UN);
 	fclose($fp);
 }
@@ -868,16 +797,15 @@ function file_unlock($fp) {
 * @param mixed[] $array
 * @return mixed if not found
 */
-function first($array) {
+function first(array $array) {
 	// reset(f()) triggers a notice
 	return reset($array);
 }
 
 /** Read password from file adminer.key in temporary directory or create one
-* @param bool $create
 * @return string|false false if the file can not be created
 */
-function password_file($create) {
+function password_file(bool $create) {
 	$filename = get_temp_dir() . "/adminer.key";
 	if (!$create && !file_exists($filename)) {
 		return false;
@@ -905,12 +833,10 @@ function rand_string() {
 
 /** Format value to use in select
 * @param string|string[] $val
-* @param string $link
 * @param Field $field
-* @param int $text_length
 * @return string HTML
 */
-function select_value($val, $link, $field, $text_length) {
+function select_value($val, string $link, array $field, int $text_length) {
 	global $adminer;
 	if (is_array($val)) {
 		$return = "";
@@ -947,10 +873,9 @@ function select_value($val, $link, $field, $text_length) {
 }
 
 /** Check whether the string is e-mail address
-* @param ?string $email
 * @return bool
 */
-function is_mail($email) {
+function is_mail(?string $email) {
 	$atom = '[-a-z0-9!#$%&\'*+/=?^_`{|}~]'; // characters of local-name
 	$domain = '[a-z0-9]([-a-z0-9]{0,61}[a-z0-9])'; // one domain component
 	$pattern = "$atom+(\\.$atom+)*@($domain?\\.)+$domain";
@@ -958,10 +883,9 @@ function is_mail($email) {
 }
 
 /** Check whether the string is URL address
-* @param string $string
 * @return bool
 */
-function is_url($string) {
+function is_url(string $string) {
 	$domain = '[a-z0-9]([-a-z0-9]{0,61}[a-z0-9])'; // one domain component //! IDN
 	return preg_match("~^(https?)://($domain?\\.)+$domain(:\\d+)?(/.*)?(\\?.*)?(#.*)?\$~i", $string); //! restrict path, query and fragment characters
 }
@@ -970,18 +894,16 @@ function is_url($string) {
 * @param Field $field
 * @return bool
 */
-function is_shortable($field) {
+function is_shortable(array $field) {
 	return preg_match('~char|text|json|lob|geometry|point|linestring|polygon|string|bytea~', $field["type"]);
 }
 
 /** Get query to compute number of found rows
-* @param string $table
 * @param list<string> $where
-* @param bool $is_group
 * @param list<string> $group
 * @return string
 */
-function count_rows($table, $where, $is_group, $group) {
+function count_rows(string $table, array $where, bool $is_group, array $group) {
 	$query = " FROM " . table($table) . ($where ? " WHERE " . implode(" AND ", $where) : "");
 	return ($is_group && (JUSH == "sql" || count($group) == 1)
 		? "SELECT COUNT(DISTINCT " . implode(", ", $group) . ")$query"
@@ -990,10 +912,9 @@ function count_rows($table, $where, $is_group, $group) {
 }
 
 /** Run query which can be killed by AJAX call after timing out
-* @param string $query
 * @return string[]
 */
-function slow_query($query) {
+function slow_query(string $query) {
 	global $adminer, $token, $driver;
 	$db = $adminer->database();
 	$timeout = $adminer->queryTimeout();
@@ -1035,10 +956,9 @@ function verify_token() {
 
 // used in compiled version
 /**
-* @param string $binary
 * @return string
 */
-function lzw_decompress($binary) {
+function lzw_decompress(string $binary) {
 	// convert binary string to codes
 	$dictionary_count = 256;
 	$bits = 8; // ceil(log($dictionary_count, 2))
diff --git a/adminer/include/html.inc.php b/adminer/include/html.inc.php
index d50d8ea7..af7995a4 100644
--- a/adminer/include/html.inc.php
+++ b/adminer/include/html.inc.php
@@ -2,19 +2,16 @@
 namespace Adminer;
 
 /** Return <script> element
-* @param string $source
-* @param string $trailing
 * @return string
 */
-function script($source, $trailing = "\n") {
+function script(string $source, string $trailing = "\n") {
 	return "<script" . nonce() . ">$source</script>$trailing";
 }
 
 /** Return <script src> element
-* @param string $url
 * @return string
 */
-function script_src($url) {
+function script_src(string $url) {
 	return "<script src='" . h($url) . "'" . nonce() . "></script>\n";
 }
 
@@ -26,11 +23,10 @@ function nonce() {
 }
 
 /** Get <input type="hidden">
-* @param string $name
 * @param string|int $value
 * @return string HTML
 */
-function input_hidden($name, $value = "") {
+function input_hidden(string $name, $value = "") {
 	return "<input type='hidden' name='" . h($name) . "' value='" . h($value) . "'>\n";
 }
 
@@ -38,7 +34,7 @@ function input_hidden($name, $value = "") {
 * @param string $special token to use instead of global $token
 * @return string HTML
 */
-function input_token($special = "") {
+function input_token(string $special = "") {
 	global $token;
 	return input_hidden("token", ($special ?: $token));
 }
@@ -51,32 +47,24 @@ function target_blank() {
 }
 
 /** Escape for HTML
-* @param string $string
 * @return string
 */
-function h($string) {
+function h(string $string) {
 	return str_replace("\0", "&#0;", htmlspecialchars($string, ENT_QUOTES, 'utf-8'));
 }
 
 /** Convert \n to <br>
-* @param string $string
 * @return string
 */
-function nl_br($string) {
+function nl_br(string $string) {
 	return str_replace("\n", "<br>", $string); // nl2br() uses XHTML before PHP 5.3
 }
 
 /** Generate HTML checkbox
-* @param string $name
 * @param string|int $value
-* @param bool $checked
-* @param string $label
-* @param string $onclick
-* @param string $class
-* @param string $labelled_by
 * @return string
 */
-function checkbox($name, $value, $checked, $label = "", $onclick = "", $class = "", $labelled_by = "") {
+function checkbox(string $name, $value, bool $checked, string $label = "", string $onclick = "", string $class = "", string $labelled_by = "") {
 	$return = "<input type='checkbox' name='$name' value='" . h($value) . "'"
 		. ($checked ? " checked" : "")
 		. ($labelled_by ? " aria-labelledby='$labelled_by'" : "")
@@ -92,7 +80,7 @@ function checkbox($name, $value, $checked, $label = "", $onclick = "", $class =
 * @param bool $use_keys always use array keys for value="", otherwise only string keys are used
 * @return string
 */
-function optionlist($options, $selected = null, $use_keys = false) {
+function optionlist($options, $selected = null, bool $use_keys = false) {
 	$return = "";
 	foreach ($options as $k => $v) {
 		$opts = array($k => $v);
@@ -115,14 +103,10 @@ function optionlist($options, $selected = null, $use_keys = false) {
 }
 
 /** Generate HTML <select>
-* @param string $name
 * @param string[] $options
-* @param string $value
-* @param string $onchange
-* @param string $labelled_by
 * @return string
 */
-function html_select($name, $options, $value = "", $onchange = "", $labelled_by = "") {
+function html_select(string $name, array $options, string $value = "", string $onchange = "", string $labelled_by = "") {
 	return "<select name='" . h($name) . "'"
 		. ($labelled_by ? " aria-labelledby='$labelled_by'" : "")
 		. ">" . optionlist($options, $value) . "</select>"
@@ -131,12 +115,10 @@ function html_select($name, $options, $value = "", $onchange = "", $labelled_by
 }
 
 /** Generate HTML radio list
-* @param string $name
 * @param string[] $options
-* @param string $value
 * @return string
 */
-function html_radios($name, $options, $value = "") {
+function html_radios(string $name, array $options, string $value = "") {
 	$return = "";
 	foreach ($options as $key => $val) {
 		$return .= "<label><input type='radio' name='" . h($name) . "' value='" . h($key) . "'" . ($key == $value ? " checked" : "") . ">" . h($val) . "</label>";
@@ -145,21 +127,16 @@ function html_radios($name, $options, $value = "") {
 }
 
 /** Get onclick confirmation
-* @param string $message
-* @param string $selector
 * @return string
 */
-function confirm($message = "", $selector = "qsl('input')") {
+function confirm(string $message = "", string $selector = "qsl('input')") {
 	return script("$selector.onclick = () => confirm('" . ($message ? js_escape($message) : lang('Are you sure?')) . "');", "");
 }
 
 /** Print header for hidden fieldset (close by </div></fieldset>)
-* @param string $id
-* @param string $legend
-* @param bool $visible
 * @return void
 */
-function print_fieldset($id, $legend, $visible = false) {
+function print_fieldset(string $id, string $legend, bool $visible = false) {
 	echo "<fieldset><legend>";
 	echo "<a href='#fieldset-$id'>$legend</a>";
 	echo script("qsl('a').onclick = partial(toggle, 'fieldset-$id');", "");
@@ -168,28 +145,23 @@ function print_fieldset($id, $legend, $visible = false) {
 }
 
 /** Return class='active' if $bold is true
-* @param bool $bold
-* @param string $class
 * @return string
 */
-function bold($bold, $class = "") {
+function bold(bool $bold, string $class = "") {
 	return ($bold ? " class='active $class'" : ($class ? " class='$class'" : ""));
 }
 
 /** Escape string for JavaScript apostrophes
-* @param string $string
 * @return string
 */
-function js_escape($string) {
+function js_escape(string $string) {
 	return addcslashes($string, "\r\n'\\/"); // slash for <script>
 }
 
 /** Generate page number for pagination
-* @param int $page
-* @param int $current
 * @return string
 */
-function pagination($page, $current) {
+function pagination(int $page, int $current) {
 	return " " . ($page == $current
 		? $page + 1
 		: '<a href="' . h(remove_from_uri("page") . ($page ? "&page=$page" . ($_GET["next"] ? "&next=" . urlencode($_GET["next"]) : "") : "")) . '">' . ($page + 1) . "</a>"
@@ -199,10 +171,9 @@ function pagination($page, $current) {
 /** Print hidden fields
 * @param mixed[] $process
 * @param list<string> $ignore
-* @param string $prefix
 * @return bool
 */
-function hidden_fields($process, $ignore = array(), $prefix = '') {
+function hidden_fields(array $process, array $ignore = array(), string $prefix = '') {
 	$return = false;
 	foreach ($process as $key => $val) {
 		if (!in_array($key, $ignore)) {
@@ -228,13 +199,11 @@ function hidden_fields_get() {
 
 /** Print enum or set input field
 * @param string $type "radio"|"checkbox"
-* @param string $attrs
 * @param Field $field
 * @param mixed $value string|array
-* @param string $empty
 * @return string
 */
-function enum_input($type, $attrs, $field, $value, $empty = null) {
+function enum_input(string $type, string $attrs, array $field, $value, string $empty = null) {
 	global $adminer;
 	preg_match_all("~'((?:[^']|'')*)'~", $field["length"], $matches);
 	$return = ($empty !== null ? "<label><input type='$type'$attrs value='$empty'" . ((is_array($value) ? in_array($empty, $value) : $value === $empty) ? " checked" : "") . "><i>" . lang('empty') . "</i></label>" : "");
@@ -249,11 +218,9 @@ function enum_input($type, $attrs, $field, $value, $empty = null) {
 /** Print edit input field
 * @param Field|RoutineField $field one field from fields()
 * @param mixed $value
-* @param string $function
-* @param bool $autofocus
 * @return void
 */
-function input($field, $value, $function, $autofocus = false) {
+function input(array $field, $value, string $function, bool $autofocus = false) {
 	global $driver, $adminer;
 	$name = h(bracket_escape($field["field"]));
 	echo "<td class='function'>";
@@ -346,7 +313,7 @@ function input($field, $value, $function, $autofocus = false) {
 * @param Field|RoutineField $field one field from fields()
 * @return mixed false to leave the original value
 */
-function process_input($field) {
+function process_input(array $field) {
 	global $adminer, $driver;
 	if (stripos($field["default"], "GENERATED ALWAYS AS ") === 0) {
 		return;
@@ -420,18 +387,16 @@ function search_tables() {
 * @param int $side JS expression
 * @return string
 */
-function on_help($command, $side = 0) {
+function on_help(string $command, int $side = 0) {
 	return script("mixin(qsl('select, input'), {onmouseover: function (event) { helpMouseover.call(this, event, $command, $side) }, onmouseout: helpMouseout});", "");
 }
 
 /** Print edit data form
-* @param string $table
 * @param Field[] $fields
 * @param mixed $row
-* @param bool $update
 * @return void
 */
-function edit_form($table, $fields, $row, $update) {
+function edit_form(string $table, array $fields, $row, bool $update) {
 	global $adminer, $error;
 	$table_name = $adminer->tableName(table_status1($table, true));
 	page_header(
@@ -536,12 +501,8 @@ function edit_form($table, $fields, $row, $update) {
 }
 
 /** Get button with icon
-* @param string $icon
-* @param string $name
-* @param string $html
-* @param string $title
 * @return string
 */
-function icon($icon, $name, $html, $title) {
+function icon(string $icon, string $name, string $html, string $title) {
 	return "<button type='submit' name='$name' title='" . h($title) . "' class='icon icon-$icon'><span>$html</span></button>";
 }
diff --git a/adminer/include/lang.inc.php b/adminer/include/lang.inc.php
index 6e3b4e00..bcce58c4 100644
--- a/adminer/include/lang.inc.php
+++ b/adminer/include/lang.inc.php
@@ -64,7 +64,7 @@ function get_lang() {
 * @param float|string $number
 * @return string
 */
-function lang($idf, $number = null) {
+function lang(string $idf, $number = null) {
 	// this is matched by compile.php
 	global $LANG, $translations;
 	$translation = ($translations[$idf] ?: $idf);
diff --git a/adminer/include/pdo.inc.php b/adminer/include/pdo.inc.php
index 862f0862..ba8a6a2b 100644
--- a/adminer/include/pdo.inc.php
+++ b/adminer/include/pdo.inc.php
@@ -7,13 +7,10 @@ if (extension_loaded('pdo')) {
 		/** @var \PDO */ protected $pdo;
 
 		/** Connect to server using DSN
-		* @param string $dsn
-		* @param string $username
-		* @param string $password
 		* @param mixed[] $options
 		* @return void
 		*/
-		function dsn($dsn, $username, $password, $options = array()) {
+		function dsn(string $dsn, string $username, string $password, array $options = array()) {
 			$options[\PDO::ATTR_ERRMODE] = \PDO::ERRMODE_SILENT;
 			$options[\PDO::ATTR_STATEMENT_CLASS] = array('Adminer\PdoResult');
 			try {
diff --git a/adminer/include/plugins.inc.php b/adminer/include/plugins.inc.php
index 2cd1120c..517931f2 100644
--- a/adminer/include/plugins.inc.php
+++ b/adminer/include/plugins.inc.php
@@ -7,7 +7,7 @@ class Plugins extends Adminer {
 	/** Register plugins
 	* @param ?list<object> $plugins object instances or null to autoload plugins from adminer-plugins/
 	*/
-	function __construct($plugins) {
+	function __construct(?array $plugins) {
 		if ($plugins === null) {
 			$plugins = array();
 			$basename = "adminer-plugins";
@@ -47,7 +47,7 @@ class Plugins extends Adminer {
 	* @param mixed[] $args
 	* @return mixed
 	*/
-	private function callParent($function, $args) {
+	private function callParent(string $function, array $args) {
 		return call_user_func_array(array('parent', $function), $args);
 	}
 
@@ -56,7 +56,7 @@ class Plugins extends Adminer {
 	* @param mixed[] $params
 	* @return mixed
 	*/
-	private function applyPlugin($function, $params) {
+	private function applyPlugin(string $function, array $params) {
 		$args = array();
 		foreach ($params as $key => $val) {
 			// some plugins accept params by reference - we don't need to propage it outside, just to the other plugins
@@ -78,7 +78,7 @@ class Plugins extends Adminer {
 	* @param mixed[] $args
 	* @return mixed
 	*/
-	private function appendPlugin($function, $args) {
+	private function appendPlugin(string $function, array $args) {
 		$return = $this->callParent($function, $args);
 		foreach ($this->plugins as $plugin) {
 			if (method_exists($plugin, $function)) {
diff --git a/adminer/include/tmpfile.inc.php b/adminer/include/tmpfile.inc.php
index 941d1b63..5b26864a 100644
--- a/adminer/include/tmpfile.inc.php
+++ b/adminer/include/tmpfile.inc.php
@@ -10,10 +10,9 @@ class TmpFile {
 	}
 
 	/**
-	* @param string $contents
 	* @return void
 	*/
-	function write($contents) {
+	function write(string $contents) {
 		$this->size += strlen($contents);
 		fwrite($this->handler, $contents);
 	}
diff --git a/adminer/include/xxtea.inc.php b/adminer/include/xxtea.inc.php
index b03e7b1c..197fab73 100644
--- a/adminer/include/xxtea.inc.php
+++ b/adminer/include/xxtea.inc.php
@@ -7,10 +7,9 @@ namespace Adminer;
 */
 
 /**
-* @param int $n
 * @return int
 */
-function int32($n) {
+function int32(int $n) {
 	while ($n >= 2147483648) {
 		$n -= 4294967296;
 	}
@@ -22,10 +21,9 @@ function int32($n) {
 
 /**
 * @param int[] $v
-* @param bool $w
 * @return string
 */
-function long2str($v, $w) {
+function long2str(array $v, bool $w) {
 	$s = '';
 	foreach ($v as $val) {
 		$s .= pack('V', $val);
@@ -37,11 +35,9 @@ function long2str($v, $w) {
 }
 
 /**
-* @param string $s
-* @param bool $w
 * @return int[]
 */
-function str2long($s, $w) {
+function str2long(string $s, bool $w) {
 	$v = array_values(unpack('V*', str_pad($s, 4 * ceil(strlen($s) / 4), "\0")));
 	if ($w) {
 		$v[] = strlen($s);
@@ -50,22 +46,17 @@ function str2long($s, $w) {
 }
 
 /**
-* @param int $z
-* @param int $y
-* @param int $sum
-* @param int $k
 * @return int
 */
-function xxtea_mx($z, $y, $sum, $k) {
+function xxtea_mx(int $z, int $y, int $sum, int $k) {
 	return int32((($z >> 5 & 0x7FFFFFF) ^ $y << 2) + (($y >> 3 & 0x1FFFFFFF) ^ $z << 4)) ^ int32(($sum ^ $y) + ($k ^ $z));
 }
 
 /** Cipher
 * @param string $str plain-text password
-* @param string $key
 * @return string binary cipher
 */
-function encrypt_string($str, $key) {
+function encrypt_string(string $str, string $key) {
 	if ($str == "") {
 		return "";
 	}
@@ -95,10 +86,9 @@ function encrypt_string($str, $key) {
 
 /** Decipher
 * @param string $str binary cipher
-* @param string $key
 * @return string|false plain-text password
 */
-function decrypt_string($str, $key) {
+function decrypt_string(string $str, string $key) {
 	if ($str == "") {
 		return "";
 	}
diff --git a/compile.php b/compile.php
index 619553ea..04aff5cf 100755
--- a/compile.php
+++ b/compile.php
@@ -87,7 +87,7 @@ function put_file($match) {
 	}
 	if (basename($match[2]) != "lang.inc.php" || !$_SESSION["lang"]) {
 		if (basename($match[2]) == "lang.inc.php") {
-			$return = str_replace('function lang($idf, $number = null) {', 'function lang($idf, $number = null) {
+			$return = str_replace('function lang(string $idf, $number = null) {', 'function lang($idf, $number = null) {
 	if (is_string($idf)) { // compiled version uses numbers, string comes from a plugin
 		// English translation is closest to the original identifiers //! pluralized translations are not found
 		$pos = array_search($idf, get_translations("en")); //! this should be cached
diff --git a/editor/include/editing.inc.php b/editor/include/editing.inc.php
index 22d6d48e..59b8c7cc 100644
--- a/editor/include/editing.inc.php
+++ b/editor/include/editing.inc.php
@@ -2,23 +2,18 @@
 namespace Adminer;
 
 /** Encode e-mail header in UTF-8
-* @param string $header
 * @return string
 */
-function email_header($header) {
+function email_header(string $header) {
 	// iconv_mime_encode requires iconv, imap_8bit requires IMAP extension
 	return "=?UTF-8?B?" . base64_encode($header) . "?="; //! split long lines
 }
 
 /** Send e-mail in UTF-8
-* @param string $email
-* @param string $subject
-* @param string $message
-* @param string $from
 * @param array{error?:list<int>, type?:list<string>, name?:list<string>, tmp_name?:list<string>} $files
 * @return bool
 */
-function send_mail($email, $subject, $message, $from = "", $files = array()) {
+function send_mail(string $email, string $subject, string $message, string $from = "", array $files = array()) {
 	$eol = PHP_EOL;
 	$message = str_replace("\n", $eol, wordwrap(str_replace("\r", "", "$message\n")));
 	$boundary = uniqid("boundary");
@@ -50,6 +45,6 @@ function send_mail($email, $subject, $message, $from = "", $files = array()) {
 * @param Field $field single field returned from fields()
 * @return bool
 */
-function like_bool($field) {
+function like_bool(array $field) {
 	return preg_match("~bool|(tinyint|bit)\\(1\\)~", $field["full_type"]);
 }
diff --git a/plugins/database-hide.php b/plugins/database-hide.php
index ac39a83e..5d190a45 100644
--- a/plugins/database-hide.php
+++ b/plugins/database-hide.php
@@ -12,7 +12,7 @@ class AdminerDatabaseHide {
 	/**
 	* @param list<string> $disabled case insensitive database names in values
 	*/
-	function __construct($disabled) {
+	function __construct(array $disabled) {
 		$this->disabled = array_map('strtolower', $disabled);
 	}
 
diff --git a/plugins/designs.php b/plugins/designs.php
index ee628cd2..dffe26fa 100644
--- a/plugins/designs.php
+++ b/plugins/designs.php
@@ -12,7 +12,7 @@ class AdminerDesigns {
 	/**
 	* @param list<string> $designs URL in key, name in value
 	*/
-	function __construct($designs) {
+	function __construct(array $designs) {
 		$this->designs = $designs;
 	}
 
diff --git a/plugins/drivers/elastic.php b/plugins/drivers/elastic.php
index daa85a78..47ec030c 100644
--- a/plugins/drivers/elastic.php
+++ b/plugins/drivers/elastic.php
@@ -13,12 +13,9 @@ if (isset($_GET["elastic"])) {
 			private $url;
 
 			/**
-			 * @param string $path
-			 * @param ?array $content
-			 * @param string $method
 			 * @return array|false
 			 */
-			function rootQuery($path, array $content = null, $method = 'GET') {
+			function rootQuery(string $path, ?array $content = null, string $method = 'GET') {
 				$file = @file_get_contents("$this->url/" . ltrim($path, '/'), false, stream_context_create(array('http' => array(
 					'method' => $method,
 					'content' => $content !== null ? json_encode($content) : null,
@@ -53,12 +50,9 @@ if (isset($_GET["elastic"])) {
 			}
 
 			/** Perform query relative to actual selected DB
-			 * @param string $path
-			 * @param ?array $content
-			 * @param string $method
 			 * @return array|false
 			 */
-			function query($path, array $content = null, $method = 'GET') {
+			function query(string $path, ?array $content = null, string $method = 'GET') {
 				// Support for global search through all tables
 				if ($path != "" && $path[0] == "S" && preg_match('/SELECT 1 FROM ([^ ]+) WHERE (.+) LIMIT ([0-9]+)/', $path, $matches)) {
 					$driver = driver();
@@ -72,12 +66,9 @@ if (isset($_GET["elastic"])) {
 			}
 
 			/**
-			 * @param string $server
-			 * @param string $username
-			 * @param string $password
 			 * @return bool
 			 */
-			function connect($server, $username, $password) {
+			function connect(string $server, string $username, string $password) {
 				preg_match('~^(https?://)?(.*)~', $server, $match);
 				$this->url = ($match[1] ?: "http://") . urlencode($username) . ":" . urlencode($password) . "@$match[2]";
 				$return = $this->query('');
@@ -531,10 +522,9 @@ if (isset($_GET["elastic"])) {
 	}
 
 	/** Alter type
-	 * @param array $table
 	 * @return mixed
 	 */
-	function alter_table($table, $name, $fields, $foreign, $comment, $engine, $collation, $auto_increment, $partitioning) {
+	function alter_table(array $table, $name, $fields, $foreign, $comment, $engine, $collation, $auto_increment, $partitioning) {
 		$properties = array();
 		foreach ($fields as $f) {
 			$field_name = trim($f[1][0]);
@@ -555,7 +545,7 @@ if (isset($_GET["elastic"])) {
 	 * @param list<string> $tables
 	 * @return bool
 	 */
-	function drop_tables($tables) {
+	function drop_tables(array $tables) {
 		$return = true;
 		foreach ($tables as $table) { //! convert to bulk api
 			$return = $return && connection()->query(urlencode($table), null, 'DELETE');
diff --git a/plugins/edit-calendar.php b/plugins/edit-calendar.php
index 314b1bc6..f56625f6 100644
--- a/plugins/edit-calendar.php
+++ b/plugins/edit-calendar.php
@@ -15,7 +15,7 @@ class AdminerEditCalendar {
 	* @param string $prepend text to append before first calendar usage
 	* @param string $langPath path to language file, %s stands for language code
 	*/
-	function __construct($prepend = null, $langPath = "jquery-ui/i18n/jquery.ui.datepicker-%s.js") {
+	function __construct(string $prepend = null, string $langPath = "jquery-ui/i18n/jquery.ui.datepicker-%s.js") {
 		$this->prepend = $prepend;
 		$this->langPath = $langPath;
 	}
diff --git a/plugins/email-table.php b/plugins/email-table.php
index 07df4c5f..7736b6b1 100644
--- a/plugins/email-table.php
+++ b/plugins/email-table.php
@@ -16,7 +16,7 @@ class AdminerEmailTable {
 	* @param string $subject quoted column name
 	* @param string $message quoted column name
 	*/
-	function __construct($table = "email", $id = "id", $title = "subject", $subject = "subject", $message = "message") {
+	function __construct(string $table = "email", string $id = "id", string $title = "subject", string $subject = "subject", string $message = "message") {
 		$this->table = $table;
 		$this->id = $id;
 		$this->title = $title;
diff --git a/plugins/file-upload.php b/plugins/file-upload.php
index bffcfbcd..c6b071f2 100644
--- a/plugins/file-upload.php
+++ b/plugins/file-upload.php
@@ -15,7 +15,7 @@ class AdminerFileUpload {
 	* @param string $displayPath prefix for displaying data, null stands for $uploadPath
 	* @param string $extensions regular expression with allowed file extensions
 	*/
-	function __construct($uploadPath = "../static/data/", $displayPath = null, $extensions = "[a-zA-Z0-9]+") {
+	function __construct(string $uploadPath = "../static/data/", string $displayPath = null, string $extensions = "[a-zA-Z0-9]+") {
 		$this->uploadPath = $uploadPath;
 		$this->displayPath = ($displayPath !== null ? $displayPath : $uploadPath);
 		$this->extensions = $extensions;
diff --git a/plugins/frames.php b/plugins/frames.php
index d65e00ec..5828b089 100644
--- a/plugins/frames.php
+++ b/plugins/frames.php
@@ -12,7 +12,7 @@ class AdminerFrames {
 	/**
 	* @param bool $sameOrigin allow running from the same origin only
 	*/
-	function __construct($sameOrigin = false) {
+	function __construct(bool $sameOrigin = false) {
 		$this->sameOrigin = $sameOrigin;
 	}
 
diff --git a/plugins/login-ip.php b/plugins/login-ip.php
index bb38583b..90f997a6 100644
--- a/plugins/login-ip.php
+++ b/plugins/login-ip.php
@@ -13,7 +13,7 @@ class AdminerLoginIp {
 	* @param list<string> $ips IP address prefixes
 	* @param list<string> $forwarded_for X-Forwarded-For prefixes if IP address matches, empty array means anything
 	*/
-	function __construct($ips, $forwarded_for = array()) {
+	function __construct(array $ips, array $forwarded_for = array()) {
 		$this->ips = $ips;
 		$this->forwarded_for= $forwarded_for;
 	}
diff --git a/plugins/login-otp.php b/plugins/login-otp.php
index d4741f3a..347f4a5d 100644
--- a/plugins/login-otp.php
+++ b/plugins/login-otp.php
@@ -12,7 +12,7 @@ class AdminerLoginOtp {
 	/**
 	* @param string $secret decoded secret, e.g. base64_decode("SECRET")
 	*/
-	function __construct($secret) {
+	function __construct(string $secret) {
 		$this->secret = $secret;
 		if ($_POST["auth"]) {
 			$_SESSION["otp"] = (string) $_POST["auth"]["otp"];
diff --git a/plugins/login-password-less.php b/plugins/login-password-less.php
index b0fca100..c70da0b4 100644
--- a/plugins/login-password-less.php
+++ b/plugins/login-password-less.php
@@ -12,7 +12,7 @@ class AdminerLoginPasswordLess {
 	/** Set allowed password
 	* @param string $password_hash result of password_hash
 	*/
-	function __construct($password_hash) {
+	function __construct(string $password_hash) {
 		$this->password_hash = $password_hash;
 	}
 
diff --git a/plugins/login-servers.php b/plugins/login-servers.php
index c4a7df37..96391de0 100644
--- a/plugins/login-servers.php
+++ b/plugins/login-servers.php
@@ -12,7 +12,7 @@ class AdminerLoginServers {
 	/** Set supported servers
 	* @param array{server:string, driver:string}[] $servers [$description => ["server" => , "driver" => "server|pgsql|sqlite|..."]]
 	*/
-	function __construct($servers) {
+	function __construct(array $servers) {
 		$this->servers = $servers;
 		if ($_POST["auth"]) {
 			$key = $_POST["auth"]["server"];
diff --git a/plugins/login-ssl.php b/plugins/login-ssl.php
index 971bf770..6cbfe299 100644
--- a/plugins/login-ssl.php
+++ b/plugins/login-ssl.php
@@ -10,12 +10,11 @@ class AdminerLoginSsl {
 	protected $ssl;
 
 	/**
-	* @param array{ssl?:string, cert?:string, verify?:bool, mode?:string, Encrypt?:bool, TrustServerCertificate?:bool} $ssl
 	* MySQL: ["key" => filename, "cert" => filename, "ca" => filename, "verify" => bool]
 	* PostgresSQL: ["mode" => sslmode] (https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNECT-SSLMODE)
 	* MSSQL: ["Encrypt" => true, "TrustServerCertificate" => true] (https://learn.microsoft.com/en-us/sql/connect/php/connection-options)
 	*/
-	function __construct($ssl) {
+	function __construct(array $ssl) {
 		$this->ssl = $ssl;
 	}
 
diff --git a/plugins/login-table.php b/plugins/login-table.php
index bd434037..3ec1e3f3 100644
--- a/plugins/login-table.php
+++ b/plugins/login-table.php
@@ -19,9 +19,8 @@ class AdminerLoginTable {
 	protected $database;
 
 	/** Set database of login table
-	* @param string $database
 	*/
-	function __construct($database) {
+	function __construct(string $database) {
 		$this->database = $database;
 	}
 
diff --git a/plugins/master-slave.php b/plugins/master-slave.php
index d8db4a31..148a5f70 100644
--- a/plugins/master-slave.php
+++ b/plugins/master-slave.php
@@ -12,7 +12,7 @@ class AdminerMasterSlave {
 	/**
 	* @param string[] $masters [$slave => $master]
 	*/
-	function __construct($masters) {
+	function __construct(array $masters) {
 		$this->masters = $masters;
 	}
 
diff --git a/plugins/slugify.php b/plugins/slugify.php
index 075576c5..2d5f99a4 100644
--- a/plugins/slugify.php
+++ b/plugins/slugify.php
@@ -13,7 +13,7 @@ class AdminerSlugify {
 	* @param string $from find these characters ...
 	* @param string $to ... and replace them by these
 	*/
-	function __construct($from = 'áčďéěíňóřšťúůýž', $to = 'acdeeinorstuuyz') {
+	function __construct(string $from = 'áčďéěíňóřšťúůýž', string $to = 'acdeeinorstuuyz') {
 		$this->from = $from;
 		$this->to = $to;
 	}
diff --git a/plugins/sql-gemini.php b/plugins/sql-gemini.php
index 0ae1f011..215b1caa 100644
--- a/plugins/sql-gemini.php
+++ b/plugins/sql-gemini.php
@@ -17,7 +17,7 @@ class AdminerSqlGemini {
 	* @param string $apiKey Get API key at: https://aistudio.google.com/apikey
 	* @param string $model Available models: https://ai.google.dev/gemini-api/docs/models#available-models
 	*/
-	function __construct($apiKey, $model = "gemini-2.0-flash") {
+	function __construct(string $apiKey, string $model = "gemini-2.0-flash") {
 		$this->apiKey = $apiKey;
 		$this->model = $model;
 	}
diff --git a/plugins/sql-log.php b/plugins/sql-log.php
index b8762162..bd63fa23 100644
--- a/plugins/sql-log.php
+++ b/plugins/sql-log.php
@@ -12,7 +12,7 @@ class AdminerSqlLog {
 	/**
 	* @param string $filename defaults to "$database.sql"
 	*/
-	function __construct($filename = "") {
+	function __construct(string $filename = "") {
 		$this->filename = $filename;
 	}
 
diff --git a/plugins/table-indexes-structure.php b/plugins/table-indexes-structure.php
index 6b5cccef..d59cb44a 100644
--- a/plugins/table-indexes-structure.php
+++ b/plugins/table-indexes-structure.php
@@ -12,7 +12,7 @@ class AdminerTableIndexesStructure {
 	* @param Index[] $indexes data about all indexes on a table
 	* @return bool
 	*/
-	function tableIndexesPrint($indexes) {
+	function tableIndexesPrint(array $indexes) {
 		echo "<table>\n";
 		echo "<thead><tr><th>" . Adminer\lang('Name') . "<th>" . Adminer\lang('Type') . "<th>" . Adminer\lang('Columns') . "</thead>\n";
 		foreach ($indexes as $name => $index) {
diff --git a/plugins/table-structure.php b/plugins/table-structure.php
index f26f039b..f9c479e4 100644
--- a/plugins/table-structure.php
+++ b/plugins/table-structure.php
@@ -12,7 +12,7 @@ class AdminerTableStructure {
 	* @param Field[] $fields data about individual fields
 	* @return bool
 	*/
-	function tableStructurePrint($fields, $tableStatus = null) {
+	function tableStructurePrint(array $fields, $tableStatus = null) {
 		echo "<div class='scrollable'>\n";
 		echo "<table class='nowrap odds'>\n";
 		echo "<thead><tr>"
diff --git a/plugins/tinymce.php b/plugins/tinymce.php
index 192e1de9..ebd31791 100644
--- a/plugins/tinymce.php
+++ b/plugins/tinymce.php
@@ -11,9 +11,8 @@ class AdminerTinymce {
 	protected $path;
 
 	/**
-	* @param string $path
 	*/
-	function __construct($path = "tiny_mce/tiny_mce.js") {
+	function __construct(string $path = "tiny_mce/tiny_mce.js") {
 		$this->path = $path;
 	}