JSON export plugin (http://forum.zdrojak.cz/?topic=808)

adminer/plugin.php

@@ -11,6 +11,7 @@ function adminer_object() {
 	$plugins = array(
 		// specify enabled plugins here
 		new AdminerDatabaseHide(array('information_schema')),
+		new AdminerDumpJson,
 		new AdminerDumpZip,
 		new AdminerDumpXml,
 		//~ new AdminerSqlLog("past-" . rtrim(`git describe --tags --abbrev=0`) . ".sql"),

plugins/dump-json.php

@@ -0,0 +1,62 @@
+<?php
+
+/** Dump to JSON format
+* @link http://www.adminer.org/plugins/#use
+* @author Jakub Vrana, http://www.vrana.cz/
+* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
+* @license http://www.gnu.org/licenses/gpl-2.0.html GNU General Public License, version 2 (one or other)
+*/
+class AdminerDumpJson {
+	/** @access protected */
+	var $database = false;
+	
+	function dumpFormat() {
+		return array('json' => 'JSON');
+	}
+
+	function dumpTable($table, $style, $is_view = false) {
+		if ($_POST["format"] == "json") {
+			return true;
+		}
+	}
+	
+	function _database() {
+		echo "}\n";
+	}
+	
+	function dumpData($table, $style, $query) {
+		if ($_POST["format"] == "json") {
+			if ($this->database) {
+				echo ",\n";
+			} else {
+				$this->database = true;
+				echo "{\n";
+				register_shutdown_function(array($this, '_database'));
+			}
+			$connection = connection();
+			$result = $connection->query($query, 1);
+			if ($result) {
+				echo '"' . addcslashes($table, "\r\n\"\\") . "\": [\n";
+				$first = true;
+				while ($row = $result->fetch_assoc()) {
+					echo ($first ? "" : ", ");
+					$first = false;
+					foreach ($row as $key => $val) {
+						json_row($key, $val);
+					}
+					json_row("");
+				}
+				echo "]";
+			}
+			return true;
+		}
+	}
+
+	function dumpHeaders($identifier, $multi_table = false) {
+		if ($_POST["format"] == "json") {
+			header("Content-Type: application/json; charset=utf-8");
+			return "json";
+		}
+	}
+
+}