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moodle/lib/datalib.php

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<?php
/**
* Library of functions for database manipulation.
*
* Other main libraries:
* - weblib.php - functions that produce web output
* - moodlelib.php - general-purpose Moodle functions
* @author Martin Dougiamas
* @version $Id$
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @package moodlecore
*/
/// GLOBAL CONSTANTS /////////////////////////////////////////////////////////
if ($SITE = get_site()) {
/**
* If $SITE global from {@link get_site()} is set then SITEID to $SITE->id, otherwise set to 1.
*/
define('SITEID', $SITE->id);
} else {
/**
* @ignore
*/
define('SITEID', 1);
}
/// FUNCTIONS FOR DATABASE HANDLING ////////////////////////////////
/**
* Execute a given sql command string
*
* Completely general function - it just runs some SQL and reports success.
*
* @uses $db
* @param string $command The sql string you wish to be executed.
* @param boolean $feedback Set this argument to true if the results generated should be printed. Default is true.
* @return string
*/
function execute_sql($command, $feedback=true) {
/// Completely general function - it just runs some SQL and reports success.
global $db;
$result = $db->Execute($command);
if ($result) {
if ($feedback) {
echo '<p><font color="green"><strong>'. get_string('success') .'</strong></font></p>';
}
return true;
} else {
if ($feedback) {
echo '<p><font color="red"><strong>'. get_string('error') .'</strong></font></p>';
}
return false;
}
}
/**
* Run an arbitrary sequence of semicolon-delimited SQL commands
*
* Assumes that the input text (file or string) consists of
* a number of SQL statements ENDING WITH SEMICOLONS. The
* semicolons MUST be the last character in a line.
* Lines that are blank or that start with "#" are ignored.
* Only tested with mysql dump files (mysqldump -p -d moodle)
*
* @uses $CFG
* @param string $sqlfile The path where a file with sql commands can be found on the server.
* @param string $sqlstring If no path is supplied then a string with semicolon delimited sql
* commands can be supplied in this argument.
* @return boolean Returns true if databse was modified successfully.
*/
function modify_database($sqlfile='', $sqlstring='') {
global $CFG;
$success = true; // Let's be optimistic
if (!empty($sqlfile)) {
if (!is_readable($sqlfile)) {
$success = false;
echo '<p>Tried to modify database, but "'. $sqlfile .'" doesn\'t exist!</p>';
return $success;
} else {
$lines = file($sqlfile);
}
} else {
$lines[] = $sqlstring;
}
$command = '';
foreach ($lines as $line) {
$line = rtrim($line);
$length = strlen($line);
if ($length and $line[0] <> '#') {
if (substr($line, $length-1, 1) == ';') {
$line = substr($line, 0, $length-1); // strip ;
$command .= $line;
$command = str_replace('prefix_', $CFG->prefix, $command); // Table prefixes
if (! execute_sql($command)) {
$success = false;
}
$command = '';
} else {
$command .= $line;
}
}
}
return $success;
}
/// FUNCTIONS TO MODIFY TABLES ////////////////////////////////////////////
/**
* Add a new field to a table, or modify an existing one (if oldfield is defined).
*
* @uses $CFG
* @uses $db
* @param type description
* @todo Finish documenting this function
*/
function table_column($table, $oldfield, $field, $type='integer', $size='10',
$signed='unsigned', $default='0', $null='not null', $after='') {
global $CFG, $db;
switch (strtolower($CFG->dbtype)) {
case 'mysql':
case 'mysqlt':
switch (strtolower($type)) {
case 'text':
$type = 'TEXT';
$signed = '';
break;
case 'integer':
$type = 'INTEGER('. $size .')';
break;
case 'varchar':
$type = 'VARCHAR('. $size .')';
$signed = '';
break;
}
if (!empty($oldfield)) {
$operation = 'CHANGE '. $oldfield .' '. $field;
} else {
$operation = 'ADD '. $field;
}
$default = 'DEFAULT \''. $default .'\'';
if (!empty($after)) {
$after = 'AFTER `'. $after .'`';
}
return execute_sql('ALTER TABLE '. $CFG->prefix . $table .' '. $operation .' '. $type .' '. $signed .' '. $default .' '. $null .' '. $after);
break;
case 'postgres7': // From Petri Asikainen
//Check db-version
$dbinfo = $db->ServerInfo();
$dbver = substr($dbinfo['version'],0,3);
//to prevent conflicts with reserved words
$realfield = '"'. $field .'"';
$field = '"'. $field .'_alter_column_tmp"';
$oldfield = '"'. $oldfield .'"';
switch (strtolower($type)) {
case 'integer':
if ($size <= 4) {
$type = 'INT2';
}
if ($size <= 10) {
$type = 'INT';
}
if ($size > 10) {
$type = 'INT8';
}
break;
case 'varchar':
$type = 'VARCHAR('. $size .')';
break;
}
$default = '\''. $default .'\'';
//After is not implemented in postgesql
//if (!empty($after)) {
// $after = "AFTER '$after'";
//}
//Use transactions
execute_sql('BEGIN');
//Allways use temporaly column
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' ADD COLUMN '. $field .' '. $type);
//Add default values
execute_sql('UPDATE '. $CFG->prefix . $table .' SET '. $field .'='. $default);
if ($dbver >= '7.3') {
// modifying 'not null' is posible before 7.3
//update default values to table
if ($null == 'NOT NULL') {
execute_sql('UPDATE '. $CFG->prefix . $table .' SET '. $field .'='. $default .' WHERE '. $field .' IS NULL');
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' ALTER COLUMN '. $field .' SET '. $null);
} else {
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' ALTER COLUMN '. $field .' DROP NOT NULL');
}
}
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' ALTER COLUMN '. $field .' SET DEFAULT '. $default);
if ( $oldfield != '""' ) {
execute_sql('UPDATE '. $CFG->prefix . $table .' SET '. $field .' = '. $oldfield);
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' DROP COLUMN '. $oldfield);
}
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' RENAME COLUMN '. $field .' TO '. $realfield);
return execute_sql('COMMIT');
break;
default:
switch (strtolower($type)) {
case 'integer':
$type = 'INTEGER';
break;
case 'varchar':
$type = 'VARCHAR';
break;
}
$default = 'DEFAULT \''. $default .'\'';
if (!empty($after)) {
$after = 'AFTER '. $after;
}
if (!empty($oldfield)) {
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' RENAME COLUMN '. $oldfield .' '. $field);
} else {
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' ADD COLUMN '. $field .' '. $type);
}
execute_sql('ALTER TABLE '. $CFG->prefix . $table .' ALTER COLUMN '. $field .' SET '. $null);
return execute_sql('ALTER TABLE '. $CFG->prefix . $table .' ALTER COLUMN '. $field .' SET '. $default);
break;
}
}
/// GENERIC FUNCTIONS TO CHECK AND COUNT RECORDS ////////////////////////////////////////
/**
* Returns true or false depending on whether the specified record exists
*
* @uses $CFG
* @param string $table The database table to be checked for the record.
* @param string $field1 The first table field to be checked for a given value. Do not supply a field1 string to leave out a WHERE clause altogether.
* @param string $value1 The value to match if field1 is specified.
* @param string $field2 The second table field to be checked for a given value.
* @param string $value2 The value to match if field2 is specified.
* @param string $field3 The third table field to be checked for a given value.
* @param string $value3 The value to match if field3 is specified.
* @return boolean True is record exists
*/
function record_exists($table, $field1='', $value1='', $field2='', $value2='', $field3='', $value3='') {
global $CFG;
if ($field1) {
$select = 'WHERE '. $field1 .' = \''. $value1 .'\'';
if ($field2) {
$select .= ' AND '. $field2 .' = \''. $value2 .'\'';
if ($field3) {
$select .= ' AND '. $field3 .' = \''. $value3 .'\'';
}
}
} else {
$select = '';
}
return record_exists_sql('SELECT * FROM '. $CFG->prefix . $table .' '. $select .' LIMIT 1');
}
/**
* Determine whether a specified record exists.
*
* This function returns true if the SQL executed returns records.
*
* @uses $CFG
* @uses $db
* @param string $sql The SQL statement to be executed.
* @return boolean
*/
function record_exists_sql($sql) {
global $CFG, $db;
if (!$rs = $db->Execute($sql)) {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg().'<br /><br />'.$sql);
}
return false;
}
if ( $rs->RecordCount() ) {
return true;
} else {
return false;
}
}
/**
* Get all specified records from the specified table and return the count of them
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $field1 The first table field to be checked for a given value. Do not supply a field1 string to leave out a WHERE clause altogether.
* @param string $value1 The value to match if field1 is specified.
* @param string $field2 The second table field to be checked for a given value.
* @param string $value2 The value to match if field2 is specified.
* @param string $field3 The third table field to be checked for a given value.
* @param string $value3 The value to match if field3 is specified.
* @return int The count of records returned from the specified criteria.
*/
function count_records($table, $field1='', $value1='', $field2='', $value2='', $field3='', $value3='') {
global $CFG;
if ($field1) {
$select = 'WHERE '. $field1 .' = \''. $value1 .'\'';
if ($field2) {
$select .= ' AND '. $field2 .' = \''. $value2 .'\'';
if ($field3) {
$select .= ' AND '. $field3 .' = \''. $value3 .'\'';
}
}
} else {
$select = '';
}
return count_records_sql('SELECT COUNT(*) FROM '. $CFG->prefix . $table .' '. $select);
}
/**
* Get all the records and count them
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $select A fragment of SQL to be used in a where clause in the SQL call.
* @param string $countitem The count string to be used in the SQL call. Default is COUNT(*).
* @return int The count of records returned from the specified criteria.
*/*
function count_records_select($table, $select='', $countitem='COUNT(*)') {
global $CFG;
if ($select) {
$select = 'WHERE '.$select;
}
return count_records_sql('SELECT '. $countitem .' FROM '. $CFG->prefix . $table .' '. $select);
}
/**
* Get all the records returned from the specified SQL call and return the count of them
*
* @uses $CFG
* @uses $db
* @param string $sql The SQL string you wish to be executed.
* @return int The count of records returned from the specified SQL string.
*/
function count_records_sql($sql) {
global $CFG, $db;
$rs = $db->Execute($sql);
if (!$rs) {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg() .'<br /><br />'. $sql);
}
return 0;
}
return $rs->fields[0];
}
/// GENERIC FUNCTIONS TO GET, INSERT, OR UPDATE DATA ///////////////////////////////////
/**
* Get a single record as an object
*
* @uses $CFG
* @param string $table The name of the table to select from
* @param string $field1 The name of the field for the first criteria
* @param string $value1 The value of the field for the first criteria
* @param string $field2 The name of the field for the second criteria
* @param string $value2 The value of the field for the second criteria
* @param string $field3 The name of the field for the third criteria
* @param string $value3 The value of the field for the third criteria
* @return object(fieldset) A fieldset object containing the first record selected
* @todo Isn't the return from this function an associative array (array type) ?
*/
function get_record($table, $field1, $value1, $field2='', $value2='', $field3='', $value3='') {
global $CFG ;
$select = 'WHERE '. $field1 .' = \''. $value1 .'\'';
if ($field2) {
$select .= ' AND '. $field2 .' = \''. $value2 .'\'';
if ($field3) {
$select .= ' AND '. $field3 .' = \''. $value3 .'\'';
}
}
return get_record_sql('SELECT * FROM '. $CFG->prefix . $table .' '. $select);
}
/**
* Get a single record as an object using the specified SQL statement
*
* A LIMIT is normally added to only look for 1 record
*
* @uses $CFG
* @uses $db
* @param string $sql The SQL string you wish to be executed.
* @return boolean
* @todo include code example of SQL calls including using LIMIT for only 1 record
*/
function get_record_sql($sql) {
global $db, $CFG;
if (isset($CFG->debug) and $CFG->debug > 7) { // Debugging mode - don't use limit
$limit = '';
} else {
$limit = ' LIMIT 1'; // Workaround - limit to one record
}
if (!$rs = $db->Execute($sql . $limit)) {
if (isset($CFG->debug) and $CFG->debug > 7) { // Debugging mode - print checks
notify( $db->ErrorMsg() . '<br /><br />'. $sql . $limit );
}
return false;
}
if (!$recordcount = $rs->RecordCount()) {
return false; // Found no records
}
if ($recordcount == 1) { // Found one record
return (object)$rs->fields;
} else { // Error: found more than one record
notify('Error: Turn off debugging to hide this error.');
notify($sql . $limit);
if ($records = $rs->GetAssoc(true)) {
notify('Found more than one record in get_record_sql !');
print_object($records);
} else {
notify('Very strange error in get_record_sql !');
print_object($rs);
}
print_continue($CFG->wwwroot .'/admin/config.php');
}
}
/**
* Gets one record from a table, as an object
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $select A fragment of SQL to be used in a where clause in the SQL call.
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array An associative array with the results from the SQL call.
*/*
function get_record_select($table, $select='', $fields='*') {
global $CFG;
if ($select) {
$select = 'WHERE '. $select;
}
return get_record_sql('SELECT '. $fields .' FROM '. $CFG->prefix . $table .' '. $select);
}
/**
* Get a number of records as an array of objects
*
* Can optionally be sorted eg "time ASC" or "time DESC"
* If "fields" is specified, only those fields are returned
* The "key" is the first column returned, eg usually "id"
* limitfrom and limitnum must both be specified or not at all
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $field ?
* @param string $value ?
* @param string $sort ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @param int $limitfrom ?
* @param int $limitnum ?
* @return array | false An associative array with the results from the SQL call or false if error.
* @todo Finish documenting this function
*/
function get_records($table, $field='', $value='', $sort='', $fields='*', $limitfrom='', $limitnum='') {
global $CFG;
if ($field) {
$select = 'WHERE '. $field .' = \''. $value .'\'';
} else {
$select = '';
}
if ($limitfrom !== '') {
switch ($CFG->dbtype) {
case 'mysql':
$limit = 'LIMIT '. $limitfrom .','. $limitnum;
break;
case 'postgres7':
$limit = 'LIMIT '. $limitnum .' OFFSET '. $limitfrom;
break;
default:
$limit = 'LIMIT '. $limitnum .','. $limitfrom;
}
} else {
$limit = '';
}
if ($sort) {
$sort = 'ORDER BY '. $sort;
}
return get_records_sql('SELECT '. $fields .' FROM '. $CFG->prefix . $table .' '. $select .' '. $sort .' '. $limit);
}
/**
* Get a number of records as an array of objects
*
* Can optionally be sorted eg "time ASC" or "time DESC"
* "select" is a fragment of SQL to define the selection criteria
* The "key" is the first column returned, eg usually "id"
* limitfrom and limitnum must both be specified or not at all
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $select A fragment of SQL to be used in a where clause in the SQL call.
* @param string $sort ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @param int $limitfrom ?
* @param int $limitnum ?
* @return array | false An associative array with the results from the SQL call or false if error.
* @todo Finish documenting this function
*/
function get_records_select($table, $select='', $sort='', $fields='*', $limitfrom='', $limitnum='') {
global $CFG;
if ($select) {
$select = 'WHERE '. $select;
}
if ($limitfrom !== '') {
switch ($CFG->dbtype) {
case 'mysql':
$limit = 'LIMIT '. $limitfrom .','. $limitnum;
break;
case 'postgres7':
$limit = 'LIMIT '. $limitnum .' OFFSET '. $limitfrom;
break;
default:
$limit = 'LIMIT '. $limitnum .','. $limitfrom;
}
} else {
$limit = '';
}
if ($sort) {
$sort = 'ORDER BY '. $sort;
}
return get_records_sql('SELECT '. $fields .' FROM '. $CFG->prefix . $table .' '. $select .' '. $sort .' '. $limit);
}
/**
* Get a number of records as an array of objects
*
* Differs from get_records() in that the values variable
* can be a comma-separated list of values eg "4,5,6,10"
* Can optionally be sorted eg "time ASC" or "time DESC"
* The "key" is the first column returned, eg usually "id"
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $field ?
* @param string $values ?
* @param string $sort ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array| false An associative array with the results from the SQL call or false if error.
* @todo Finish documenting this function
*/
function get_records_list($table, $field='', $values='', $sort='', $fields='*') {
global $CFG;
if ($field) {
$select = 'WHERE '. $field .' IN ( '. $values .')';
} else {
$select = '';
}
if ($sort) {
$sort = 'ORDER BY '. $sort;
}
return get_records_sql('SELECT '. $fields .' FROM '. $CFG->prefix . $table .' '. $select .' '. $sort);
}
/**
* Get a number of records as an array of objects
*
* The "key" is the first column returned, eg usually "id"
* The sql statement is provided as a string.
*
* @uses $CFG
* @uses $db
* @param string $sql The SQL string you wish to be executed.
* @return array | false Returns an associative array with found records or false if no records or error occured.
*/
function get_records_sql($sql) {
global $CFG, $db;
if (!$rs = $db->Execute($sql)) {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg() .'<br /><br />'. $sql);
}
return false;
}
if ( $rs->RecordCount() > 0 ) {
if ($records = $rs->GetAssoc(true)) {
foreach ($records as $key => $record) {
$objects[$key] = (object) $record;
}
return $objects;
} else {
return false;
}
} else {
return false;
}
}
/**
* Get a number of records as an array of objects
*
* Can optionally be sorted eg "time ASC" or "time DESC"
* If "fields" is specified, only those fields are returned
* The "key" is the first column returned, eg usually "id"
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $field ?
* @param string $value ?
* @param string $sort ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array An associative array with the results from the SQL call.
* @todo Finish documenting this function
*/
function get_records_menu($table, $field='', $value='', $sort='', $fields='*') {
global $CFG;
if ($field) {
$select = 'WHERE '. $field .' = \''. $value .'\'';
} else {
$select = '';
}
if ($sort) {
$sort = 'ORDER BY '. $sort;
}
return get_records_sql_menu('SELECT '. $fields .' FROM '. $CFG->prefix . $table .' '. $select .' '. $sort);
}
/**
* Get a number of records as an array of values
*
* Can optionally be sorted eg "time ASC" or "time DESC"
* "select" is a fragment of SQL to define the selection criteria
* Returns associative array of first two fields
*
* @uses $CFG
* @param string $table The database table to be checked against.
* @param string $select A fragment of SQL to be used in a where clause in the SQL call.
* @param string $sort ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array An associative array with the results from the SQL call.
* @todo Finish documenting this function
*/
function get_records_select_menu($table, $select='', $sort='', $fields='*') {
global $CFG;
if ($select) {
$select = 'WHERE '. $select;
}
if ($sort) {
$sort = 'ORDER BY '. $sort;
}
return get_records_sql_menu('SELECT '. $fields .' FROM '. $CFG->prefix . $table .' '. $select .' '. $sort);
}
/**
* Retrieve an array of the first two columns returned from a SQL statment.
*
* Given a SQL statement, this function returns an associative
* array of the first two columns. This is most useful in
* combination with the {@link choose_from_menu()} function to create
* a form menu.
*
* @uses $CFG
* @uses $db
* @param string $sql The SQL string you wish to be executed.
* @return boolean
* @todo Finish documenting this function
*/
function get_records_sql_menu($sql) {
global $CFG, $db;
if (!$rs = $db->Execute($sql)) {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg() .'<br /><br />'. $sql);
}
return false;
}
if ( $rs->RecordCount() > 0 ) {
while (!$rs->EOF) {
$menu[$rs->fields[0]] = $rs->fields[1];
$rs->MoveNext();
}
return $menu;
} else {
return false;
}
}
/**
* Get a single field from a database record
*
* @uses $CFG
* @uses $db
* @param string $table The database table to be checked against.
* @param string $field1 The first table field to be checked for a given value. Do not supply a field1 string to leave out a WHERE clause altogether.
* @param string $value1 The value to match if field1 is specified.
* @param string $field2 The second table field to be checked for a given value.
* @param string $value2 The value to match if field2 is specified.
* @param string $field3 The third table field to be checked for a given value.
* @param string $value3 The value to match if field3 is specified.
* @return mixed | false Returns the value return from the SQL statment or false if an error occured.
* @todo Finish documenting this function
*/
function get_field($table, $return, $field1, $value1, $field2='', $value2='', $field3='', $value3='') {
global $db, $CFG;
$select = 'WHERE '. $field1 .' = \''. $value1 .'\'';
if ($field2) {
$select .= ' AND '. $field2 .' = \''. $value2 .'\'';
if ($field3) {
$select .= ' AND '. $field3 .' = \''. $value3 .'\'';
}
}
$rs = $db->Execute('SELECT '. $return .' FROM '. $CFG->prefix . $table .' '. $select);
if (!$rs) {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg() .'<br /><br />SELECT '. $return .' FROM '. $CFG->prefix . $table .' '. $select);
}
return false;
}
if ( $rs->RecordCount() == 1 ) {
return $rs->fields[$return];
} else {
return false;
}
}
/**
* Get a single field from a database record
*
* @uses $CFG
* @uses $db
* @param string $sql The SQL string you wish to be executed.
* @return mixed | false Returns the value return from the SQL statment or false if an error occured.
* @todo Finish documenting this function
*/
function get_field_sql($sql) {
global $db, $CFG;
$rs = $db->Execute($sql);
if (!$rs) {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg() .'<br /><br />'. $sql);
}
return false;
}
if ( $rs->RecordCount() == 1 ) {
return $rs->fields[0];
} else {
return false;
}
}
/**
* Set a single field in a database record
*
* @uses $CFG
* @uses $db
* @param string $table The database table to be checked against.
* @param string $field1 The first table field to be checked for a given value. Do not supply a field1 string to leave out a WHERE clause altogether.
* @param string $value1 The value to match if field1 is specified.
* @param string $field2 The second table field to be checked for a given value.
* @param string $value2 The value to match if field2 is specified.
* @param string $field3 The third table field to be checked for a given value.
* @param string $value3 The value to match if field3 is specified.
* @return array An associative array with the results from the SQL call.
* @todo Verify return type
*/
function set_field($table, $newfield, $newvalue, $field1, $value1, $field2='', $value2='', $field3='', $value3='') {
global $db, $CFG;
$select = 'WHERE '. $field1 .' = \''. $value1 .'\'';
if ($field2) {
$select .= ' AND '. $field2 .' = \''. $value2 .'\'';
if ($field3) {
$select .= ' AND '. $field3 .' = \''. $value3 .'\'';
}
}
return $db->Execute('UPDATE '. $CFG->prefix . $table .' SET '. $newfield .' = \''. $newvalue .'\' '. $select);
}
/**
* Delete one or more records from a table
*
* @uses $CFG
* @uses $db
* @param string $table The database table to be checked against.
* @param string $field1 The first table field to be checked for a given value. Do not supply a field1 string to leave out a WHERE clause altogether.
* @param string $value1 The value to match if field1 is specified.
* @param string $field2 The second table field to be checked for a given value.
* @param string $value2 The value to match if field2 is specified.
* @param string $field3 The third table field to be checked for a given value.
* @param string $value3 The value to match if field3 is specified.
* @return array An associative array with the results from the SQL call.
* @todo Verify return type
*/
function delete_records($table, $field1='', $value1='', $field2='', $value2='', $field3='', $value3='') {
global $db, $CFG;
if ($field1) {
$select = 'WHERE '. $field1 .' = \''. $value1 .'\'';
if ($field2) {
$select .= ' AND '. $field2 .' = \''. $value2 .'\'';
if ($field3) {
$select .= ' AND '. $field3 .' = \''. $value3 .'\'';
}
}
} else {
$select = '';
}
return $db->Execute('DELETE FROM '. $CFG->prefix . $table .' '. $select);
}
/**
* Delete one or more records from a table
*
* @uses $CFG
* @uses $db
* @param string $table The database table to be checked against.
* @param string $select A fragment of SQL to be used in a where clause in the SQL call (used to define the selection criteria).
* @return array An associative array with the results from the SQL call.
* @todo Verify return type.
*/
function delete_records_select($table, $select='') {
global $CFG, $db;
if ($select) {
$select = 'WHERE '.$select;
}
return $db->Execute('DELETE FROM '. $CFG->prefix . $table .' '. $select);
}
/**
* Insert a record into a table and return the "id" field if required
*
* If the return ID isn't required, then this just reports success as true/false.
* $dataobject is an object containing needed data
*
* @uses $db
* @uses $CFG
* @param string $table The database table to be checked against.
* @param array $dataobject An associative array with contents equal to fieldname=>fieldvalue. Must have an entry for 'id' to map to the table specified.
* @param boolean $returnid Should the id of the newly created record entry be returned? If this option is not requested then true/false is returned.
* @param string $primarykey Defaults to 'id'. The primary key to use against the specified table when inserting the contents of $dataobject.
* @return int | false Returns the id for the new record created or false if an error occured.
* @todo Finish documenting this function. Dataobject is actually an associateive array, correct?
*/
function insert_record($table, $dataobject, $returnid=true, $primarykey='id') {
global $db, $CFG;
/// Execute a dummy query to get an empty recordset
if (!$rs = $db->Execute('SELECT * FROM '. $CFG->prefix . $table .' WHERE '. $primarykey .' = \'-1\'')) {
return false;
}
/// Get the correct SQL from adoDB
if (!$insertSQL = $db->GetInsertSQL($rs, (array)$dataobject, true)) {
return false;
}
/// Run the SQL statement
if (!$rs = $db->Execute($insertSQL)) {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg() .'<br /><br />'.$insertSQL);
}
return false;
}
/// If a return ID is not needed then just return true now
if (!$returnid) {
return true;
}
/// Find the return ID of the newly inserted record
switch ($CFG->dbtype) {
case 'postgres7': // Just loves to be special
$oid = $db->Insert_ID();
if ($rs = $db->Execute('SELECT '. $primarykey .' FROM '. $CFG->prefix . $table .' WHERE oid = '. $oid)) {
if ($rs->RecordCount() == 1) {
return (integer) $rs->fields[0];
}
}
return false;
default:
return $db->Insert_ID(); // Should work on most databases, but not all!
}
}
/**
* Update a record in a table
*
* $dataobject is an object containing needed data
* Relies on $dataobject having a variable "id" to
* specify the record to update
*
* @uses $CFG
* @uses $db
* @param string $table The database table to be checked against.
* @param array $dataobject An associative array with contents equal to fieldname=>fieldvalue. Must have an entry for 'id' to map to the table specified.
* @return boolean
* @todo Finish documenting this function. Dataobject is actually an associateive array, correct?
*/
function update_record($table, $dataobject) {
global $db, $CFG;
if (! isset($dataobject->id) ) {
return false;
}
// Determine all the fields in the table
if (!$columns = $db->MetaColumns($CFG->prefix . $table)) {
return false;
}
$data = (array)$dataobject;
// Pull out data matching these fields
foreach ($columns as $column) {
if ($column->name <> 'id' and isset($data[$column->name]) ) {
$ddd[$column->name] = $data[$column->name];
}
}
// Construct SQL queries
$numddd = count($ddd);
$count = 0;
$update = '';
foreach ($ddd as $key => $value) {
$count++;
$update .= $key .' = \''. $value .'\'';
if ($count < $numddd) {
$update .= ', ';
}
}
if ($rs = $db->Execute('UPDATE '. $CFG->prefix . $table .' SET '. $update .' WHERE id = \''. $dataobject->id .'\'')) {
return true;
} else {
if (isset($CFG->debug) and $CFG->debug > 7) {
notify($db->ErrorMsg() .'<br /><br />UPDATE '. $CFG->prefix . $table .' SET '. $update .' WHERE id = \''. $dataobject->id .'\'');
}
return false;
}
}
/// USER DATABASE ////////////////////////////////////////////////
/**
* Get a complete user record, which includes all the info
*
* in the user record, as well as membership information
* Suitable for setting as $USER session cookie.
*
* @uses $CFG
* @uses SITEID
* @param string $field The first table field to be checked for a given value.
* @param string $value The value to match for $field.
* @return array
* @todo Finish documenting this function
*/
*/
function get_user_info_from_db($field, $value) {
global $CFG;
if (!$field or !$value) {
return false;
}
/// Get all the basic user data
if (! $user = get_record_select('user', $field .' = \''. $value .'\' AND deleted <> \'1\'')) {
return false;
}
/// Add membership information
if ($admins = get_records('user_admins', 'userid', $user->id)) {
$user->admin = true;
}
$user->student[SITEID] = isstudent(SITEID, $user->id);
/// Determine enrolments based on current enrolment module
require_once($CFG->dirroot .'/enrol/'. $CFG->enrol .'/enrol.php');
$enrol = new enrolment_plugin();
$enrol->get_student_courses($user);
$enrol->get_teacher_courses($user);
/// Get various settings and preferences
if ($displays = get_records('course_display', 'userid', $user->id)) {
foreach ($displays as $display) {
$user->display[$display->course] = $display->display;
}
}
if ($preferences = get_records('user_preferences', 'userid', $user->id)) {
foreach ($preferences as $preference) {
$user->preference[$preference->name] = $preference->value;
}
}
if ($groups = get_records('groups_members', 'userid', $user->id)) {
foreach ($groups as $groupmember) {
$courseid = get_field('groups', 'courseid', 'id', $groupmember->groupid);
$user->groupmember[$courseid] = $groupmember->groupid;
}
}
return $user;
}
/**
* Does this username and password specify a valid admin user?
*
* @uses $CFG
* @param string $username The name of the user to be tested for admin rights
* @param string $md5password The password supplied by the user in md5 encrypted format.
* @return boolean
*/
function adminlogin($username, $md5password) {
global $CFG;
return record_exists_sql("SELECT u.id
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_admins a
WHERE u.id = a.userid
AND u.username = '$username'
AND u.password = '$md5password'");
}
/**
* Get the guest user information from the database
*
* @return object(user) An associative array with the details of the guest user account.
* @todo Is object(user) a correct return type? Or is array the proper return type with a note that the contents include all details for a user.
*/
function get_guest() {
return get_user_info_from_db('username', 'guest');
}
/**
* Returns $user object of the main admin user
*
* @uses $CFG
* @return object(admin) An associative array representing the admin user.
* @todo Verify documentation of this function
*/
function get_admin () {
global $CFG;
if ( $admins = get_admins() ) {
foreach ($admins as $admin) {
return $admin; // ie the first one
}
} else {
return false;
}
}
/**
* Returns list of all admins
*
* @uses $CFG
* @return array An associative array of user records.
* @todo Finish documenting this function
*/
function get_admins() {
global $CFG;
return get_records_sql("SELECT u.*, a.id as adminid
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_admins a
WHERE a.userid = u.id
ORDER BY a.id ASC");
}
/**
* Returns list of all creators
*
* @uses $CFG
* @return array An associative array.
* @todo Finish documenting this function
*/
function get_creators() {
global $CFG;
return get_records_sql("SELECT u.*
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_coursecreators a
WHERE a.userid = u.id
ORDER BY u.id ASC");
}
/**
* Returns $user object of the main teacher for a course
*
* @uses $CFG
* @param int $courseid The course in question.
* @return array | false An associative array representing the user record of the main teacher for the specified course or false if error.
* @todo Finish documenting this function
*/
function get_teacher($courseid) {
global $CFG;
if ( $teachers = get_course_teachers($courseid, 't.authority ASC')) {
foreach ($teachers as $teacher) {
if ($teacher->authority) {
return $teacher; // the highest authority teacher
}
}
} else {
return false;
}
}
/**
* Searches logs to find all enrolments since a certain date
*
* used to print recent activity
*
* @uses $CFG
* @param int $courseid The course in question.
* @return array | false An associative array with the results from the SQL call or false if error.
* @todo Finish documenting this function
*/
function get_recent_enrolments($courseid, $timestart) {
global $CFG;
return get_records_sql("SELECT DISTINCT u.id, u.firstname, u.lastname, l.time
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_students s,
{$CFG->prefix}log l
WHERE l.time > '$timestart'
AND l.course = '$courseid'
AND l.module = 'course'
AND l.action = 'enrol'
AND l.info = u.id
AND u.id = s.userid
AND s.course = '$courseid'
ORDER BY l.time ASC");
}
/**
* Returns array of userinfo of all students in this course
* or on this site if courseid is id of site
*
* @uses $CFG
* @uses SITEID
* @param int $courseid The course in question.
* @param string $sort ?
* @param string $dir ?
* @param int $page ?
* @param int $recordsperpage ?
* @param string $firstinitial ?
* @param string $lastinitial ?
* @param ? $group ?
* @param string $search ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @param string $exceptions ?
* @return array An associative array with the users requested.
* @todo Finish documenting this function
*/
function get_course_students($courseid, $sort='s.timeaccess', $dir='', $page=0, $recordsperpage=99999,
$firstinitial='', $lastinitial='', $group=NULL, $search='', $fields='', $exceptions='') {
global $CFG;
if ($courseid == SITEID and $CFG->allusersaresitestudents) {
// return users with confirmed, undeleted accounts who are not site teachers
// the following is a mess because of different conventions in the different user functions
$sort = str_replace('s.timeaccess', 'lastaccess', $sort); // site users can't be sorted by timeaccess
$sort = str_replace('timeaccess', 'lastaccess', $sort); // site users can't be sorted by timeaccess
$sort = str_replace('u.', '', $sort); // the get_user function doesn't use the u. prefix to fields
$fields = str_replace('u.', '', $fields);
if ($sort) {
$sort = $sort .' '. $dir;
}
// Now we have to make sure site teachers are excluded
if ($teachers = get_records('user_teachers', 'course', SITEID)) {
foreach ($teachers as $teacher) {
$exceptions .= ','. $teacher->userid;
}
$exceptions = ltrim($exceptions, ',');
}
return get_users(true, $search, true, $exceptions, $sort, $firstinitial, $lastinitial,
$page, $recordsperpage, $fields ? $fields : '*');
}
switch ($CFG->dbtype) {
case 'mysql':
$fullname = ' CONCAT(firstname," ",lastname) ';
$limit = 'LIMIT '. $page .','. $recordsperpage;
$LIKE = 'LIKE';
break;
case 'postgres7':
$fullname = " firstname||' '||lastname ";
$limit = 'LIMIT '. $recordsperpage .' OFFSET '.($page);
$LIKE = 'ILIKE';
break;
default:
$fullname = ' firstname||" "||lastname ';
$limit = 'LIMIT '. $recordsperpage .','. $page;
$LIKE = 'ILIKE';
}
$groupmembers = '';
// make sure it works on the site course
$select = 's.course = \''. $courseid .'\' AND ';
if ($courseid == SITEID) {
$select = '';
}
$select .= 's.userid = u.id AND u.deleted = \'0\' ';
if (!$fields) {
$fields = 'u.id, u.confirmed, u.username, u.firstname, u.lastname, '.
'u.maildisplay, u.mailformat, u.maildigest, u.email, u.city, '.
'u.country, u.picture, u.idnumber, u.department, u.institution, '.
'u.emailstop, u.lang, u.timezone, s.timeaccess as lastaccess';
}
if ($search) {
$search = ' AND ('. $fullname .' '. $LIKE .'\'%'. $search .'%\' OR email '. $LIKE .'\'%'. $search .'%\') ';
}
if ($firstinitial) {
$select .= ' AND u.firstname '. $LIKE .'\''. $firstinitial .'%\' ';
}
if ($lastinitial) {
$select .= ' AND u.lastname '. $LIKE .'\''. $lastinitial .'%\' ';
}
if ($group === 0) { /// Need something here to get all students not in a group
return array();
} else if ($group !== NULL) {
$groupmembers = ', '. $CFG->prefix .'groups_members gm ';
$select .= ' AND u.id = gm.userid AND gm.groupid = \''. $group .'\'';
}
if (!empty($exceptions)) {
$select .= ' AND u.id NOT IN ('. $exceptions .')';
}
if ($sort) {
$sort = ' ORDER BY '. $sort .' ';
}
$students = get_records_sql("SELECT $fields
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_students s
$groupmembers
WHERE $select $search $sort $dir $limit");
if ($courseid != SITEID) {
return $students;
}
// We are here because we need the students for the site.
// These also include teachers on real courses minus those on the site
if ($teachers = get_records('user_teachers', 'course', SITEID)) {
foreach ($teachers as $teacher) {
$exceptions .= ','. $teacher->userid;
}
$exceptions = ltrim($exceptions, ',');
$select .= ' AND u.id NOT IN ('. $exceptions .')';
}
if (!$teachers = get_records_sql("SELECT $fields
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_teachers s
$groupmembers
WHERE $select $search $sort $dir $limit")) {
return $students;
}
if (!$students) {
return $teachers;
}
return $teachers + $students;
}
/**
* Counts the students in a given course (or site), or a subset of them
*
* @param object $course The course in question as a course object.
* @param string $search ?
* @param string $firstinitial ?
* @param string $lastinitial ?
* @param ? $group ?
* @param string $exceptions ?
* @return int
* @todo Finish documenting this function
*/
function count_course_students($course, $search='', $firstinitial='', $lastinitial='', $group=NULL, $exceptions='') {
if ($students = get_course_students($course->id, '', '', 0, 999999, $firstinitial, $lastinitial, $group, $search, '', $exceptions)) {
return count($students);
}
return 0;
}
/**
* Returns list of all teachers in this course
*
* If $courseid matches the site id then this function
* returns a list of all teachers for the site.
*
* @uses $CFG
* @param int $courseid The course in question.
* @param string $sort ?
* @param string $exceptions ?
* @return array An associative array with the results from the SQL call.
* @todo Finish documenting this function
*/
function get_course_teachers($courseid, $sort='t.authority ASC', $exceptions='') {
global $CFG;
if (!empty($exceptions)) {
$except = ' AND u.id NOT IN ('. $exceptions .') ';
} else {
$except = '';
}
return get_records_sql("SELECT u.id, u.username, u.firstname, u.lastname, u.maildisplay, u.mailformat, u.maildigest,
u.email, u.city, u.country, u.lastlogin, u.picture, u.lang, u.timezone,
u.emailstop, t.authority,t.role,t.editall,t.timeaccess as lastaccess
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_teachers t
WHERE t.course = '$courseid' AND t.userid = u.id
AND u.deleted = '0' AND u.confirmed = '1' $except
ORDER BY $sort");
}
/**
* Returns all the users of a course: students and teachers
*
* @param int $courseid The course in question.
* @param string $sort ?
* @param string $exceptions ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array An associative array.
* @todo Finish documenting this function
*/
function get_course_users($courseid, $sort='timeaccess DESC', $exceptions='', $fields='') {
/// Using this method because the single SQL is too inefficient
// Note that this has the effect that teachers and students are
// sorted individually. Returns first all teachers, then all students
if (!$teachers = get_course_teachers($courseid, $sort, $exceptions)) {
$teachers = array();
}
if (!$students = get_course_students($courseid, $sort, '', 0, 99999, '', '', NULL, '', $fields, $exceptions)) {
$students = array();
}
return $teachers + $students;
}
/**
* Search through course users
*
* If $coursid specifies the site course then this function searches
* through all undeleted and confirmed users
*
* @uses $CFG
* @uses SITEID
* @param int $courseid The course in question.
* @param int $groupid The group in question.
* @param string $searchtext ?
* @param string $sort ?
* @param string $exceptions ?
* @return array An associative array.
* @todo Finish documenting this function
*/
*/
function search_users($courseid, $groupid, $searchtext, $sort='', $exceptions='') {
global $CFG;
switch ($CFG->dbtype) {
case 'mysql':
$fullname = ' CONCAT(u.firstname," ",u.lastname) ';
$LIKE = 'LIKE';
break;
case 'postgres7':
$fullname = " u.firstname||' '||u.lastname ";
$LIKE = 'ILIKE';
break;
default:
$fullname = ' u.firstname||" "||u.lastname ';
$LIKE = 'ILIKE';
}
if (!empty($exceptions)) {
$except = ' AND u.id NOT IN ('. $exceptions .') ';
} else {
$except = '';
}
if (!empty($sort)) {
$order = ' ORDER BY '. $sort;
} else {
$order = '';
}
$select = 'u.deleted = \'0\' AND u.confirmed = \'1\'';
if (!$courseid or $courseid == SITEID) {
return get_records_sql("SELECT u.id, u.firstname, u.lastname, u.email
FROM {$CFG->prefix}user u
WHERE $select
AND ($fullname $LIKE '%$searchtext%' OR u.email $LIKE '%$searchtext%')
$except $order");
} else {
if ($groupid) {
return get_records_sql("SELECT u.id, u.firstname, u.lastname, u.email
FROM {$CFG->prefix}user u,
{$CFG->prefix}groups_members g
WHERE $select AND g.groupid = '$groupid' AND g.userid = u.id
AND ($fullname $LIKE '%$searchtext%' OR u.email $LIKE '%$searchtext%')
$except $order");
} else {
if (!$teachers = get_records_sql("SELECT u.id, u.firstname, u.lastname, u.email
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_teachers s
WHERE $select AND s.course = '$courseid' AND s.userid = u.id
AND ($fullname $LIKE '%$searchtext%' OR u.email $LIKE '%$searchtext%')
$except $order")) {
$teachers = array();
}
if (!$students = get_records_sql("SELECT u.id, u.firstname, u.lastname, u.email
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_students s
WHERE $select AND s.course = '$courseid' AND s.userid = u.id
AND ($fullname $LIKE '%$searchtext%' OR u.email $LIKE '%$searchtext%')
$except $order")) {
$students = array();
}
return $teachers + $students;
}
}
}
/**
* Returns a list of all site users
* Obsolete, just calls get_course_users(SITEID)
*
* @uses SITEID
* @deprecated use {@link get_course_users()} instead.
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array | false An associative array with the results from the SQL call or false if error.
* @todo Finish documenting this function. The return type need to be better defined.
*/
function get_site_users($sort='u.lastaccess DESC', $fields='*', $exceptions='') {
return get_course_users(SITEID, $sort, $exceptions, $fields);
}
/**
* Returns a subset of users
*
* @uses $CFG
* @param boolean $get If false then only a count of the records is returned
* @param string $search A simple string to search for
* @param boolean $confirmed A switch to allow/disallow unconfirmed users
* @param array(int) $exceptions A list of IDs to ignore, eg 2,4,5,8,9,10
* @param string $sort A SQL snippet for the sorting criteria to use
* @param string $firstinitial ?
* @param string $lastinitial ?
* @param string $page ?
* @param string $recordsperpage ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array | false | int An associative array with the results from the SQL call unless get is true in which case the integer count of the records found is returned. False is returned if an error is encountered.
* @todo Finish documenting this function. The return type needs to be better defined.
*/
function get_users($get=true, $search='', $confirmed=false, $exceptions='', $sort='firstname ASC',
$firstinitial='', $lastinitial='', $page=0, $recordsperpage=99999, $fields='*') {
global $CFG;
switch ($CFG->dbtype) {
case 'mysql':
$limit = 'LIMIT '. $page .','. $recordsperpage;
$fullname = ' CONCAT(firstname," ",lastname) ';
$LIKE = 'LIKE';
break;
case 'postgres7':
$limit = 'LIMIT '. $recordsperpage .' OFFSET '.($page);
$fullname = " firstname||' '||lastname ";
$LIKE = 'ILIKE';
break;
default:
$limit = 'LIMIT '. $recordsperpage .','. $page;
$fullname = ' firstname||" "||lastname ';
$LIKE = 'ILIKE';
}
$select = 'username <> \'guest\' AND deleted = 0';
if ($search) {
$select .= " AND ($fullname $LIKE '%$search%' OR email $LIKE '%$search%') ";
}
if ($confirmed) {
$select .= ' AND confirmed = \'1\' ';
}
if ($exceptions) {
$select .= ' AND id NOT IN ('. $exceptions .') ';
}
if ($firstinitial) {
$select .= ' AND firstname '. $LIKE .' \''. $firstinitial .'%\'';
}
if ($lastinitial) {
$select .= ' AND lastname '. $LIKE .' \''. $lastinitial .'%\'';
}
if ($sort and $get) {
$sort = ' ORDER BY '. $sort .' ';
} else {
$sort = '';
}
if ($get) {
return get_records_select('user', $select .' '. $sort .' '. $limit, '', $fields);
} else {
return count_records_select('user', $select .' '. $sort .' '. $limit);
}
}
/**
* shortdesc (optional)
*
* longdesc
*
* @uses $CFG
* @param string $sort ?
* @param string $dir ?
* @param int $categoryid ?
* @param int $categoryid ?
* @param string $search ?
* @param string $firstinitial ?
* @param string $lastinitial ?
* @return array
* @todo Finish documenting this function
*/
function get_users_listing($sort='lastaccess', $dir='ASC', $page=0, $recordsperpage=99999,
$search='', $firstinitial='', $lastinitial='') {
global $CFG;
switch ($CFG->dbtype) {
case 'mysql':
$limit = 'LIMIT '. $page .','. $recordsperpage;
$fullname = ' CONCAT(firstname," ",lastname) ';
$LIKE = 'LIKE';
break;
case 'postgres7':
$limit = 'LIMIT '. $recordsperpage .' OFFSET '.($page);
$fullname = ' firstname||\' \'||lastname ';
$LIKE = 'ILIKE';
break;
default:
$limit = 'LIMIT '. $recordsperpage .','. $page;
$fullname = ' firstname||\' \'||lastname ';
$LIKE = 'LIKE';
}
$select = 'deleted <> 1';
if ($search) {
$select .= " AND ($fullname $LIKE '%$search%' OR email $LIKE '%$search%') ";
}
if ($firstinitial) {
$select .= ' AND firstname '. $LIKE .' \''. $firstinitial .'%\' ';
}
if ($lastinitial) {
$select .= ' AND lastname '. $LIKE .' \''. $lastinitial .'%\' ';
}
if ($sort) {
$sort = ' ORDER BY '. $sort .' '. $dir;
}
/// warning: will return UNCONFIRMED USERS
return get_records_sql("SELECT id, username, email, firstname, lastname, city, country, lastaccess, confirmed
FROM {$CFG->prefix}user
WHERE $select $sort $limit ");
}
/**
* shortdesc (optional)
*
* longdesc
*
* @uses $CFG
* @return array
* @todo Finish documenting this function
*/
function get_users_confirmed() {
global $CFG;
return get_records_sql("SELECT *
FROM {$CFG->prefix}user
WHERE confirmed = 1
AND deleted = 0
AND username <> 'guest'
AND username <> 'changeme'");
}
/**
* shortdesc (optional)
*
* longdesc
*
* @uses $CFG
* @param string $cutofftime ?
* @return array
* @todo Finish documenting this function
*/
function get_users_unconfirmed($cutofftime=2000000000) {
global $CFG;
return get_records_sql("SELECT *
FROM {$CFG->prefix}user
WHERE confirmed = 0
AND firstaccess > 0
AND firstaccess < '$cutofftime'");
}
/**
* shortdesc (optional)
*
* longdesc
*
* @uses $CFG
* @param string $cutofftime ?
* @return array
* @todo Finish documenting this function
*/
function get_users_longtimenosee($cutofftime) {
global $CFG;
return get_records_sql("SELECT DISTINCT *
FROM {$CFG->prefix}user_students
WHERE timeaccess > '0'
AND timeaccess < '$cutofftime' ");
}
/**
* Returns an array of group objects that the user is a member of
* in the given course. If userid isn't specified, then return a
* list of all groups in the course.
*
* @uses $CFG
* @param int $courseid The course in question.
* @param int $userid The id of the user in question as found in the 'user' table 'id' field.
* @return array
* @todo Finish documenting this function
*/
function get_groups($courseid, $userid=0) {
global $CFG;
if ($userid) {
$dbselect = ', '. $CFG->prefix .'groups_members m';
$userselect = 'AND m.groupid = g.id AND m.userid = \''. $userid .'\'';
} else {
$dbselect = '';
$userselect = '';
}
return get_records_sql("SELECT DISTINCT g.*
FROM {$CFG->prefix}groups g $dbselect
WHERE g.courseid = '$courseid' $userselect ");
}
/**
* Returns an array of user objects
*
* @uses $CFG
* @param int $groupid The group in question.
* @param string $sort ?
* @param string $exceptions ?
* @return array
* @todo Finish documenting this function
*/
function get_group_users($groupid, $sort='u.lastaccess DESC', $exceptions='') {
global $CFG;
if (!empty($exceptions)) {
$except = ' AND u.id NOT IN ('. $exceptions .') ';
} else {
$except = '';
}
return get_records_sql("SELECT DISTINCT u.*
FROM {$CFG->prefix}user u,
{$CFG->prefix}groups_members m
WHERE m.groupid = '$groupid'
AND m.userid = u.id $except
ORDER BY $sort");
}
/**
* An efficient way of finding all the users who aren't in groups yet
*
* Currently unimplemented.
* @uses $CFG
* @param int $courseid The course in question.
* @return array
*/
function get_users_not_in_group($courseid) {
global $CFG;
return array(); /// XXX TO BE DONE
}
/**
* Returns an array of user objects
*
* @uses $CFG
* @param int $groupid The group in question.
* @param string $sort ?
* @return array
* @todo Finish documenting this function
*/
function get_group_students($groupid, $sort='u.lastaccess DESC') {
global $CFG;
return get_records_sql("SELECT DISTINCT u.*
FROM {$CFG->prefix}user u,
{$CFG->prefix}groups_members m,
{$CFG->prefix}groups g,
{$CFG->prefix}user_students s
WHERE m.groupid = '$groupid'
AND m.userid = u.id
AND m.groupid = g.id
AND g.courseid = s.course
AND s.userid = u.id
ORDER BY $sort");
}
/**
* Returns the user's group in a particular course
*
* @uses $CFG
* @param int $courseid The course in question.
* @param int $userid The id of the user as found in the 'user' table.
* @return array
* @todo Finish documenting this function
*/
function user_group($courseid, $userid) {
global $CFG;
return get_record_sql("SELECT g.*
FROM {$CFG->prefix}groups g,
{$CFG->prefix}groups_members m
WHERE g.courseid = '$courseid'
AND g.id = m.groupid
AND m.userid = '$userid'");
}
/// OTHER SITE AND COURSE FUNCTIONS /////////////////////////////////////////////
/**
* Returns $course object of the top-level site.
*
* @return array
* @todo Finish documenting this function. Is $course an 'object(course)' or an associative 'array(course)' or simply an 'array'?
*/
function get_site () {
if ( $course = get_record('course', 'category', 0)) {
return $course;
} else {
return false;
}
}
/**
* Returns list of courses, for whole site, or category
*
* @uses $CFG
* @uses $USER
* @param int $categoryid ?
* @param string $sort ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @return array
* @todo Finish documenting this function
*/
function get_courses($categoryid='all', $sort='c.sortorder ASC', $fields='c.*') {
/// This function deliberately uses PHP to do the checking at the end,
/// because MySQL has been known to really bog down when trying to do a JOIN
/// on the 'course' and 'user_teachers' table at the same time.
global $USER, $CFG;
$select = array();
if ($categoryid != 'all') {
$select[] = "c.category = '$categoryid'";
}
/// Admins can always see invisible courses
/// Creators can always see invisible courses
/// Teachers can only see their own invisible courses <- needs detailed checking
/// Students can't see invisible courses at all
/// Guests can't see invisible courses at all
$visiblecourses = '';
$showallinvisible = iscreator(); // includes admins
$hideallinvisible = empty($USER->id) || (!isteacher());
if ($hideallinvisible) {
$select[] = 'c.visible > 0';
}
if ($select) {
$selectsql = $CFG->prefix .'course c WHERE '. implode(' AND ', $select);
} else {
$selectsql = $CFG->prefix .'course c ';
}
$courses = get_records_sql('SELECT DISTINCT '. $fields .' FROM '. $selectsql .' ORDER BY '. $sort);
if ($courses and (!$hideallinvisible) and (!$showallinvisible)) { // For ordinary users we need to check visibility
foreach ($courses as $key => $course) {
if ($course->visible == 0) { // Invisible course, let's check if we are a teacher
if (!isteacher($course->id)) { // We shouldn't see this
unset($courses[$key]);
}
}
}
}
return $courses;
}
/**
* Returns list of courses, for whole site, or category
*
* Similar to get_courses, but allows paging
*
* @uses $CFG
* @uses $USER
* @param int $categoryid ?
* @param string $sort ?
* @param string $fields A comma separated list of fields to be returned from the chosen table.
* @param int $totalcount Passed by reference. ?
* @param int $limitfrom ?
* @param int $limitnum ?
* @return array
* @todo Finish documenting this function
*/
function get_courses_page($categoryid='all', $sort='c.sortorder ASC', $fields='c.*',
&$totalcount, $limitfrom='', $limitnum='') {
/// This function deliberately uses PHP to do the checking at the end,
/// because MySQL has been known to really bog down when trying to do a JOIN
/// on the 'course' and 'user_teachers' table at the same time.
global $USER, $CFG;
$select = array();
if ($categoryid != 'all') {
$select[] = 'c.category = \''. $categoryid .'\'';
}
/// Admins can always see invisible courses
/// Creators can always see invisible courses
/// Teachers can only see their own invisible courses <- needs detailed checking
/// Students can't see invisible courses at all
/// Guests can't see invisible courses at all
$visiblecourses = '';
$showallinvisible = iscreator(); // includes admins
$hideallinvisible = empty($USER->id) || (!isteacher());
if ($hideallinvisible) {
$select[] = 'c.visible > 0';
}
if ($select) {
$selectsql = $CFG->prefix .'course c WHERE '.implode(' AND ', $select);
} else {
$selectsql = $CFG->prefix .'course c ';
}
$courses = get_records_sql('SELECT DISTINCT '. $fields .' FROM '. $selectsql .' ORDER BY '. $sort);
if ($courses and (!$hideallinvisible) and (!$showallinvisible)) { // For ordinary users we need to check visibility
foreach ($courses as $key => $course) {
if ($course->visible == 0) { // Invisible course, let's check if we are a teacher
if (!isteacher($course->id)) { // We shouldn't see this
unset($courses[$key]);
}
}
}
}
$totalcount = count($courses);
if ($courses and ($limitfrom or $limitnum)) {
$courses = array_slice($courses, (int)$limitfrom, (int)$limitnum);
}
return $courses;
}
/**
* shortdesc (optional)
*
* longdesc
*
* @uses $CFG
* @param int $userid ?
* @param string $sort ?
* @return array
* @todo Finish documenting this function
*/
function get_my_courses($userid, $sort='visible DESC,sortorder ASC') {
global $CFG;
$course = array();
if ($students = get_records('user_students', 'userid', $userid, '', 'id, course')) {
foreach ($students as $student) {
$course[$student->course] = $student->course;
}
}
if ($teachers = get_records('user_teachers', 'userid', $userid, '', 'id, course')) {
foreach ($teachers as $teacher) {
$course[$teacher->course] = $teacher->course;
}
}
if (empty($course)) {
return $course;
}
$courseids = implode(',', $course);
return get_records_list('course', 'id', $courseids, $sort);
// The following is correct but VERY slow with large datasets
//
// return get_records_sql("SELECT c.*
// FROM {$CFG->prefix}course c,
// {$CFG->prefix}user_students s,
// {$CFG->prefix}user_teachers t
// WHERE (s.userid = '$userid' AND s.course = c.id)
// OR (t.userid = '$userid' AND t.course = c.id)
// GROUP BY c.id
// ORDER BY $sort");
}
/**
* Returns a list of courses that match a search
*
* @uses $CFG
* @param array $searchterms ?
* @param string $sort ?
* @param int $page ?
* @param int $recordsperpage ?
* @param int $totalcount Passed in by reference. ?
* @return array
* @todo Finish documenting this function
*/
function get_courses_search($searchterms, $sort='fullname ASC', $page=0, $recordsperpage=50, &$totalcount) {
global $CFG;
switch ($CFG->dbtype) {
case 'mysql':
$limit = 'LIMIT '. $page .','. $recordsperpage;
break;
case 'postgres7':
$limit = 'LIMIT '. $recordsperpage .' OFFSET '.($page * $recordsperpage);
break;
default:
$limit = 'LIMIT '. $recordsperpage .','. $page;
}
//to allow case-insensitive search for postgesql
if ($CFG->dbtype == 'postgres7') {
$LIKE = 'ILIKE';
$NOTLIKE = 'NOT ILIKE'; // case-insensitive
$REGEXP = '~*';
$NOTREGEXP = '!~*';
} else {
$LIKE = 'LIKE';
$NOTLIKE = 'NOT LIKE';
$REGEXP = 'REGEXP';
$NOTREGEXP = 'NOT REGEXP';
}
$fullnamesearch = '';
$summarysearch = '';
foreach ($searchterms as $searchterm) {
if ($fullnamesearch) {
$fullnamesearch .= ' AND ';
}
if ($summarysearch) {
$summarysearch .= ' AND ';
}
if (substr($searchterm,0,1) == '+') {
$searchterm = substr($searchterm,1);
$summarysearch .= " summary $REGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
$fullnamesearch .= " fullname $REGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
} else if (substr($searchterm,0,1) == "-") {
$searchterm = substr($searchterm,1);
$summarysearch .= " summary $NOTREGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
$fullnamesearch .= " fullname $NOTREGEXP '(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)' ";
} else {
$summarysearch .= ' summary '. $LIKE .'\'%'. $searchterm .'%\' ';
$fullnamesearch .= ' fullname '. $LIKE .'\'%'. $searchterm .'%\' ';
}
}
$selectsql = $CFG->prefix .'course WHERE ('. $fullnamesearch .' OR '. $summarysearch .') AND category > \'0\'';
$totalcount = count_records_sql('SELECT COUNT(*) FROM '. $selectsql);
$courses = get_records_sql('SELECT * FROM '. $selectsql .' ORDER BY '. $sort .' '. $limit);
if ($courses) { /// Remove unavailable courses from the list
foreach ($courses as $key => $course) {
if (!$course->visible) {
if (!isteacher($course->id)) {
unset($courses[$key]);
$totalcount--;
}
}
}
}
return $courses;
}
/**
* Returns a sorted list of categories
*
* @param string $parent ?
* @param string $sort ?
* @return ?
* @todo Finish documenting this function
*/
function get_categories($parent='none', $sort='sortorder ASC') {
if ($parent == 'none') {
$categories = get_records('course_categories', '', '', $sort);
} else {
$categories = get_records('course_categories', 'parent', $parent, $sort);
}
if ($categories) { /// Remove unavailable categories from the list
$creator = iscreator();
foreach ($categories as $key => $category) {
if (!$category->visible) {
if (!$creator) {
unset($categories[$key]);
}
}
}
}
return $categories;
}
/**
* This recursive function makes sure that the courseorder is consecutive
*
* @param int $categoryid ?
* @param int $n ?
* @return ?
* @todo Finish documenting this function
*/
function fix_course_sortorder($categoryid=0, $n=0) {
$count = 0;
if ($courses = get_courses($categoryid)) {
foreach ($courses as $course) {
set_field('course', 'sortorder', $n, 'id', $course->id);
$n++;
$count++;
}
}
set_field('course_categories', 'coursecount', $count, 'id', $categoryid);
if ($categories = get_categories($categoryid)) {
foreach ($categories as $category) {
$n = fix_course_sortorder($category->id, $n);
}
}
return $n;
}
/**
* This function creates a default separated/connected scale
*
* This function creates a default separated/connected scale
* so there's something in the database. The locations of
* strings and files is a bit odd, but this is because we
* need to maintain backward compatibility with many different
* existing language translations and older sites.
*
* @uses $CFG
*/
function make_default_scale() {
global $CFG;
$defaultscale = NULL;
$defaultscale->courseid = 0;
$defaultscale->userid = 0;
$defaultscale->name = get_string('separateandconnected');
$defaultscale->scale = get_string('postrating1', 'forum').','.
get_string('postrating2', 'forum').','.
get_string('postrating3', 'forum');
$defaultscale->timemodified = time();
/// Read in the big description from the file. Note this is not
/// HTML (despite the file extension) but Moodle format text.
$parentlang = get_string('parentlang');
if (is_readable($CFG->dirroot .'/lang/'. $CFG->lang .'/help/forum/ratings.html')) {
$file = file($CFG->dirroot .'/lang/'. $CFG->lang .'/help/forum/ratings.html');
} else if ($parentlang and is_readable($CFG->dirroot .'/lang/'. $parentlang .'/help/forum/ratings.html')) {
$file = file($CFG->dirroot .'/lang/'. $parentlang .'/help/forum/ratings.html');
} else if (is_readable($CFG->dirroot .'/lang/en/help/forum/ratings.html')) {
$file = file($CFG->dirroot .'/lang/en/help/forum/ratings.html');
} else {
$file = '';
}
$defaultscale->description = addslashes(implode('', $file));
if ($defaultscale->id = insert_record('scale', $defaultscale)) {
execute_sql('UPDATE '. $CFG->prefix .'forum SET scale = \''. $defaultscale->id .'\'', false);
}
}
/**
* Returns a menu of all available scales from the site as well as the given course
*
* Returns a menu of all available scales from the site as well as the given course
*
* @uses $CFG
* @param int $courseid The id of the course as found in the 'course' table.
* @return array
* @todo Finish documenting this function
*/
function get_scales_menu($courseid=0) {
global $CFG;
$sql = "SELECT id, name FROM {$CFG->prefix}scale
WHERE courseid = '0' or courseid = '$courseid'
ORDER BY courseid ASC, name ASC";
if ($scales = get_records_sql_menu($sql)) {
return $scales;
}
make_default_scale();
return get_records_sql_menu($sql);
}
/// MODULE FUNCTIONS /////////////////////////////////////////////////
/**
* Just gets a raw list of all modules in a course
*
* @uses $CFG
* @param int $courseid The id of the course as found in the 'course' table.
* @return array
* @todo Finish documenting this function
*/
function get_course_mods($courseid) {
global $CFG;
return get_records_sql("SELECT cm.*, m.name as modname
FROM {$CFG->prefix}modules m,
{$CFG->prefix}course_modules cm
WHERE cm.course = '$courseid'
AND cm.deleted = '0'
AND cm.module = m.id ");
}
/**
* Given an instance of a module, finds the coursemodule description
*
* @uses $CFG
* @param string $modulename ?
* @param string $instance ?
* @param int $courseid The id of the course as found in the 'course' table.
* @return array
* @todo Finish documenting this function
*/
function get_coursemodule_from_instance($modulename, $instance, $courseid) {
global $CFG;
return get_record_sql("SELECT cm.*, m.name
FROM {$CFG->prefix}course_modules cm,
{$CFG->prefix}modules md,
{$CFG->prefix}$modulename m
WHERE cm.course = '$courseid' AND
cm.deleted = '0' AND
cm.instance = m.id AND
md.name = '$modulename' AND
md.id = cm.module AND
m.id = '$instance'");
}
/**
* Returns an array of all the active instances of a particular module in a given course, sorted in the order they are defined
*
* Returns an array of all the active instances of a particular
* module in a given course, sorted in the order they are defined
* in the course. Returns false on any errors.
*
* @uses $CFG
* @param string $modulename The name of the module to get instances for
* @param object(course) $course This depends on an accurate $course->modinfo
* @todo Finish documenting this function. Is a course object to be documented as object(course) or array(course) since a coures object is really just an associative array, not a php object?
*/
function get_all_instances_in_course($modulename, $course) {
global $CFG;
if (!$modinfo = unserialize($course->modinfo)) {
return array();
}
if (!$rawmods = get_records_sql("SELECT cm.id as coursemodule, m.*,cw.section,cm.visible as visible,cm.groupmode
FROM {$CFG->prefix}course_modules cm,
{$CFG->prefix}course_sections cw,
{$CFG->prefix}modules md,
{$CFG->prefix}$modulename m
WHERE cm.course = '$course->id' AND
cm.instance = m.id AND
cm.deleted = '0' AND
cm.section = cw.id AND
md.name = '$modulename' AND
md.id = cm.module")) {
return array();
}
// Hide non-visible instances from students
if (isteacher($course->id)) {
$invisible = -1;
} else {
$invisible = 0;
}
foreach ($modinfo as $mod) {
if ($mod->mod == $modulename and $mod->visible > $invisible) {
$instance = $rawmods[$mod->cm];
if (!empty($mod->extra)) {
$instance->extra = $mod->extra;
}
$outputarray[] = $instance;
}
}
return $outputarray;
}
/**
* Determine whether a module instance is visible within a course
*
* Given a valid module object with info about the id and course,
* and the module's type (eg "forum") returns whether the object
* is visible or not
*
* @uses $CFG
* @param $moduletype ?
* @param $module ?
* @return boolean
* @todo Finish documenting this function
*/
function instance_is_visible($moduletype, $module) {
global $CFG;
if ($records = get_records_sql("SELECT cm.instance, cm.visible
FROM {$CFG->prefix}course_modules cm,
{$CFG->prefix}modules m
WHERE cm.course = '$module->course' AND
cm.module = m.id AND
m.name = '$moduletype' AND
cm.instance = '$module->id'")) {
foreach ($records as $record) { // there should only be one - use the first one
return $record->visible;
}
}
return true; // visible by default!
}
/// LOG FUNCTIONS /////////////////////////////////////////////////////
/**
* Add an entry to the log table.
*
* Add an entry to the log table. These are "action" focussed rather
* than web server hits, and provide a way to easily reconstruct what
* any particular student has been doing.
*
* @uses $CFG
* @uses $USER
* @uses $db
* @uses $REMOTE_ADDR
* @uses SITEID
* @param int $course The course id
* @param string $module The module name - e.g. forum, journal, resource, course, user etc
* @param string $action View, edit, post (often but not always the same as the file.php)
* @param string $url The file and parameters used to see the results of the action
* @param string $info Additional description information
* @param string $cm The course_module->id if there is one
* @param string $user If log regards $user other than $USER
*/
function add_to_log($courseid, $module, $action, $url='', $info='', $cm=0, $user=0) {
global $db, $CFG, $USER, $REMOTE_ADDR;
if ($user) {
$userid = $user;
} else {
if (isset($USER->realuser)) { // Don't log
return;
}
$userid = empty($USER->id) ? '0' : $USER->id;
}
$timenow = time();
$info = addslashes($info);
$url = html_entity_decode($url); // for php < 4.3.0 this is defined in moodlelib.php
$result = $db->Execute('INSERT INTO '. $CFG->prefix .'log (time, userid, course, ip, module, cmid, action, url, info)
VALUES (' . "'$timenow', '$userid', '$courseid', '$REMOTE_ADDR', '$module', '$cm', '$action', '$url', '$info')");
if (!$result and ($CFG->debug > 7)) {
echo '<p>Error: Could not insert a new entry to the Moodle log</p>'; // Don't throw an error
}
if (!$user and isset($USER->id)) {
if ($courseid == SITEID) {
$db->Execute('UPDATE '. $CFG->prefix .'user SET lastIP=\''. $REMOTE_ADDR .'\', lastaccess=\''. $timenow .'\'
WHERE id = \''. $USER->id .'\' ');
} else if (isstudent($courseid)) {
$db->Execute('UPDATE '. $CFG->prefix .'user_students SET timeaccess = \''. $timenow .'\' '.
'WHERE course = \''. $courseid .'\' AND userid = \''. $userid .'\'');
} else if (isteacher($courseid, false, false)) {
$db->Execute('UPDATE '. $CFG->prefix .'user_teachers SET timeaccess = \''. $timenow .'\' '.
'WHERE course = \''. $courseid .'\' AND userid = \''. $userid .'\'');
}
}
}
/**
* Select all log records based on SQL criteria
*
* @uses $CFG
* @param string $select SQL select criteria
* @param string $order SQL order by clause to sort the records returned
* @param string $limitfrom ?
* @param int $limitnum ?
* @param int $totalcount Passed in by reference.
* @return array
* @todo Finish documenting this function
*/
function get_logs($select, $order='l.time DESC', $limitfrom='', $limitnum='', &$totalcount) {
global $CFG;
if ($limitfrom !== '') {
switch ($CFG->dbtype) {
case 'mysql':
$limit = 'LIMIT '. $limitfrom .','. $limitnum;
break;
case 'postgres7':
$limit = 'LIMIT '. $limitnum .' OFFSET '. $limitfrom;
break;
default:
$limit = 'LIMIT '. $limitnum .','. $limitfrom;
}
} else {
$limit = '';
}
if ($order) {
$order = 'ORDER BY '. $order;
}
$selectsql = $CFG->prefix .'log l LEFT JOIN '. $CFG->prefix .'user u ON l.userid = u.id '. ((strlen($select) > 0) ? 'WHERE '. $select : '');
$totalcount = count_records_sql('SELECT COUNT(*) FROM '. $selectsql);
return get_records_sql('SELECT l.*, u.firstname, u.lastname, u.picture
FROM '. $selectsql .' '. $order .' '. $limit);
}
/**
* Select all log records for a given course and user
*
* @uses $CFG
* @param int $userid The id of the user as found in the 'user' table.
* @param int $courseid The id of the course as found in the 'course' table.
* @param string $coursestart ?
* @todo Finish documenting this function
*/
function get_logs_usercourse($userid, $courseid, $coursestart) {
global $CFG;
if ($courseid) {
$courseselect = ' AND course = \''. $courseid .'\' ';
} else {
$courseselect = '';
}
return get_records_sql("SELECT floor((`time` - $coursestart)/86400) as day, count(*) as num
FROM {$CFG->prefix}log
WHERE userid = '$userid'
AND `time` > '$coursestart' $courseselect
GROUP BY day ");
}
/**
* Select all log records for a given course, user, and day
*
* @uses $CFG
* @param int $userid The id of the user as found in the 'user' table.
* @param int $courseid The id of the course as found in the 'course' table.
* @param string $daystart ?
* @return array
* @todo Finish documenting this function
*/
function get_logs_userday($userid, $courseid, $daystart) {
global $CFG;
if ($courseid) {
$courseselect = ' AND course = \''. $courseid .'\' ';
} else {
$courseselect = '';
}
return get_records_sql("SELECT floor((`time` - $daystart)/3600) as hour, count(*) as num
FROM {$CFG->prefix}log
WHERE userid = '$userid'
AND `time` > '$daystart' $courseselect
GROUP BY hour ");
}
/**
* Returns an object with counts of failed login attempts
*
* Returns information about failed login attempts. If the current user is
* an admin, then two numbers are returned: the number of attempts and the
* number of accounts. For non-admins, only the attempts on the given user
* are shown.
*
* @param string $mode Either 'admin', 'teacher' or 'everybody'
* @param string $username The username we are searching for
* @param string $lastlogin The date from which we are searching
* @return int
*/
function count_login_failures($mode, $username, $lastlogin) {
$select = 'module=\'login\' AND action=\'error\' AND time > '. $lastlogin;
if (isadmin()) { // Return information about all accounts
if ($count->attempts = count_records_select('log', $select)) {
$count->accounts = count_records_select('log', $select, 'COUNT(DISTINCT info)');
return $count;
}
} else if ($mode == 'everybody' or ($mode == 'teacher' and isteacher())) {
if ($count->attempts = count_records_select('log', $select .' AND info = \''. $username .'\'')) {
return $count;
}
}
return NULL;
}
/// GENERAL HELPFUL THINGS ///////////////////////////////////
/**
* Dump a given object's information in a PRE block.
*
* Mostly just used for debugging.
*
* @param mixed $object The data to be printed
* @todo add example usage and example output
*/
function print_object($object) {
echo '<pre>';
print_r($object);
echo '</pre>';
}
// vim:autoindent:expandtab:shiftwidth=4:tabstop=4:tw=140:
?>
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