Vergleich inc/db_sqlite.php - 1.8.4 - 1.8.8

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* @var string */ public $type;	* @var string */ public $type;
	/** * PDOStatement objects of performed queries. * * @var array */ public $query_objects = array();
/** * A count of the number of queries.	/** * A count of the number of queries.
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/** * Explanation of a query.	/** * Explanation of a query.
* * @var string	* * @var string
*/ public $explain;	*/ public $explain;
/**	/**
* The current version of SQLite.	* The current version of SQLite.
* * @var string	* * @var string
/ public $version; /* * The current table type in use (myisam/innodb)	/ public $version; /* * The current table type in use (myisam/innodb)
* * @var string	* * @var string
*/ public $table_type = "myisam";	*/ public $table_type = "myisam";
/**	/**
* The table prefix used for simple select, update, insert and delete queries * * @var string	* The table prefix used for simple select, update, insert and delete queries * * @var string
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/** * The extension used to run the SQL database	/** * The extension used to run the SQL database
* * @var string	* * @var string
*/ public $engine = "pdo";	*/ public $engine = "pdo";
/**	/**
* Weather or not this engine can use the search functionality	* Weather or not this engine can use the search functionality
*	*
* @var boolean */ public $can_search = true;	* @var boolean */ public $can_search = true;
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* The database encoding currently in use (if supported) * * @var string	* The database encoding currently in use (if supported) * * @var string
*/	*/
public $db_encoding = "";	public $db_encoding = "";

/** * The time spent performing queries * * @var float */ public $query_time = 0;	/** * The time spent performing queries * * @var float */ public $query_time = 0;
	/** * Our pdo implementation * * @var dbpdoEngine */ var $db;
/** * Connect to the database server. *	/** * Connect to the database server. *
* @param array Array of DBMS connection details. * @return resource The DB connection resource. Returns false on failure.	* @param array $config Array of DBMS connection details. * @return bool Returns false on failure, otherwise true
*/ function connect($config)	*/ function connect($config)
{	{
get_execution_time(); require_once MYBB_ROOT."inc/db_pdo.php";	get_execution_time(); require_once MYBB_ROOT."inc/db_pdo.php";
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/** * Query the database. *	/** * Query the database. *
* @param string The query SQL. * @param boolean 1 if hide errors, 0 if not. * @return resource The query data.	* @param string $string The query SQL. * @param boolean\|int $hide_errors 1 if hide errors, 0 if not. * @param integer $write_query 1 if executes on master database, 0 if not. * @return PDOStatement The query data.
*/ function query($string, $hide_errors=0, $write_query=0) {	*/ function query($string, $hide_errors=0, $write_query=0) {
global $pagestarttime, $db, $mybb;	global $mybb;
get_execution_time();	get_execution_time();
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$this->error($error['message'], $error['code']); } }	$this->error($error['message'], $error['code']); } }
	$this->query_objects[] = $query;
if($this->error_number($query) > 0 && !$hide_errors) {	if($this->error_number($query) > 0 && !$hide_errors) {
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if(strtolower(substr(ltrim($string), 0, 6)) == "create") { $query->closeCursor();	if(strtolower(substr(ltrim($string), 0, 6)) == "create") { $query->closeCursor();
return;	return null;
} return $query;	} return $query;
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/** * Explain a query on the database. *	/** * Explain a query on the database. *
* @param string The query SQL. * @param string The time it took to perform the query.	* @param string $string The query SQL. * @param string $qtime The time it took to perform the query.
*/ function explain_query($string, $qtime) {	*/ function explain_query($string, $qtime) {
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/** * Execute a write query on the database *	/** * Execute a write query on the database *
* @param string The query SQL. * @param boolean 1 if hide errors, 0 if not. * @return resource The query data.	* @param string $query The query SQL. * @param boolean\|int $hide_errors 1 if hide errors, 0 if not. * @return PDOStatement The query data.
*/ function write_query($query, $hide_errors=0) {	*/ function write_query($query, $hide_errors=0) {
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/** * Return a result array for a query. *	/** * Return a result array for a query. *
* @param resource The result data. * @param constant The type of array to return.	* @param PDOStatement $query The result data. * @param int $resulttype One of PDO's constants: FETCH_ASSOC, FETCH_BOUND, FETCH_CLASS, FETCH_INTO, FETCH_LAZY, FETCH_NAMED, FETCH_NUM, FETCH_OBJ or FETCH_BOTH
* @return array The array of results. */	* @return array The array of results. */
function fetch_array($query, $resulttype=0)	function fetch_array($query, $resulttype=PDO::FETCH_BOTH)
{	{
$array = $this->db->fetch_array($query);	$array = $this->db->fetch_array($query, $resulttype);
return $array; } /** * Return a specific field from a query.	return $array; } /** * Return a specific field from a query.
* * @param resource The query ID. * @param string The name of the field to return. * @param int The number of the row to fetch it from. */	* * @param PDOStatement $query The query ID. * @param string $field The name of the field to return. * @param int\|bool $row The number of the row to fetch it from. * @return mixed */
function fetch_field($query, $field, $row=false) { if($row !== false)	function fetch_field($query, $field, $row=false) { if($row !== false)
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} $array = $this->fetch_array($query); return $array[$field];	} $array = $this->fetch_array($query); return $array[$field];
}	}
/** * Moves internal row pointer to the next row *	/** * Moves internal row pointer to the next row *
* @param resource The query ID. * @param int The pointer to move the row to.	* @param PDOStatement $query The query ID. * @param int $row The pointer to move the row to.
*/ function data_seek($query, $row)	*/ function data_seek($query, $row)
{ return $this->db->seek($query, $row); }	{ $this->db->seek($query, $row); } /** * Closes cursors of registered queries. * */ function close_cursors() { $result = true; foreach($this->query_objects as $query) { if(!$query->closeCursor()) { $result = false; } } return $result; }
/** * Return the number of rows resulting from a query.	/** * Return the number of rows resulting from a query.
* * @param resource The query data.	* * @param PDOStatement $query The query data.
* @return int The number of rows in the result.	* @return int The number of rows in the result.
*/	*/
function num_rows($query) { return $this->db->num_rows($query);	function num_rows($query) { return $this->db->num_rows($query);
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/** * Return the last id number of inserted data. *	/** * Return the last id number of inserted data. *
	* @param string $name
* @return int The id number. */ function insert_id($name="")	* @return int The id number. */ function insert_id($name="")
{	{
return $this->db->insert_id($name);	return $this->db->insert_id($name);
}	}
/** * Close the connection with the DBMS. *	/** * Close the connection with the DBMS. *
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/** * Return an error number. *	/** * Return an error number. *
	* @param PDOStatement $query
* @return int The error number of the current error.	* @return int The error number of the current error.
*/ function error_number($query="")	*/ function error_number($query=null)
{	{
if(!$query)	if($query == null)
{ $query = $this->db->last_query; }	{ $query = $this->db->last_query; }
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/** * Return an error string. *	/** * Return an error string. *
	* @param PDOStatement $query
* @return string The explanation for the current error. */	* @return string The explanation for the current error. */
function error_string($query="")	function error_string($query=null)
{ if($this->error_number != "") {	{ if($this->error_number != "") {
if(!$query)	if($query == null)
{ $query = $this->db->last_query; }	{ $query = $this->db->last_query; }
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return $error_string; }	return $error_string; }
	return '';
} /** * Output a database error.	} /** * Output a database error.
* * @param string The string to present as an error.	* * @param string $string The string to present as an error. * @param PDOStatement $query * @param string $error * @param int $error_no
*/	*/
function error($string="", $query="", $error="", $error_no="")	function error($string="", $query=null, $error="", $error_no=0)
{	{
$this->db->roll_back();
if($this->error_reporting) {	if($this->error_reporting) {
if(!$query) {	if($query == null) {
$query = $this->db->last_query; }	$query = $this->db->last_query; }
if($error_no == "") { $error_no = $this->error_number($query); }	if($error_no == 0) { $error_no = $this->error_number($query); }
if($error == "") { $error = $this->error_string($query);	if($error == "") { $error = $this->error_string($query);
}	}
if(class_exists("errorHandler")) { global $error_handler;	if(class_exists("errorHandler")) { global $error_handler;
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"query" => $string ); $error_handler->error(MYBB_SQL, $error);	"query" => $string ); $error_handler->error(MYBB_SQL, $error);
}	}
else { trigger_error("<strong>[SQL] [{$error_no}] {$error}</strong><br />{$string}", E_USER_ERROR);	else { trigger_error("<strong>[SQL] [{$error_no}] {$error}</strong><br />{$string}", E_USER_ERROR);
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/** * Returns the number of affected rows in a query. *	/** * Returns the number of affected rows in a query. *
	* @param PDOStatement $query
* @return int The number of affected rows. */	* @return int The number of affected rows. */
function affected_rows($query="")	function affected_rows($query=null)
{	{
if(!$query)	if($query == null)
{ $query = $this->db->last_query; }	{ $query = $this->db->last_query; }
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/** * Return the number of fields. *	/** * Return the number of fields. *
* @param resource The query data.	* @param PDOStatement $query The query data.
* @return int The number of fields. */ function num_fields($query)	* @return int The number of fields. */ function num_fields($query)
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} return $this->db->num_fields($query);	} return $this->db->num_fields($query);
}	}
/** * Lists all tables in the database. *	/** * Lists all tables in the database. *
* @param string The database name. * @param string Prefix of the table (optional)	* @param string $database The database name. * @param string $prefix Prefix of the table (optional)
* @return array The table list. */ function list_tables($database, $prefix='')	* @return array The table list. */ function list_tables($database, $prefix='')
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/** * Check if a table exists in a database. *	/** * Check if a table exists in a database. *
* @param string The table name.	* @param string $table The table name.
* @return boolean True when exists, false if not. */ function table_exists($table) { $query = $this->query("SELECT COUNT(name) as count FROM sqlite_master WHERE type='table' AND name='{$this->table_prefix}{$table}'"); $exists = $this->fetch_field($query, "count");	* @return boolean True when exists, false if not. */ function table_exists($table) { $query = $this->query("SELECT COUNT(name) as count FROM sqlite_master WHERE type='table' AND name='{$this->table_prefix}{$table}'"); $exists = $this->fetch_field($query, "count");
$query->closeCursor(); if($exists > 0) { return true; } else { return false; } }	$query->closeCursor(); if($exists > 0) { return true; } else { return false; } }
/** * Check if a field exists in a database. *	/** * Check if a field exists in a database. *
* @param string The field name. * @param string The table name.	* @param string $field The field name. * @param string $table The table name.
* @return boolean True when exists, false if not. */ function field_exists($field, $table) { $query = $this->query("PRAGMA table_info('{$this->table_prefix}{$table}')");	* @return boolean True when exists, false if not. */ function field_exists($field, $table) { $query = $this->query("PRAGMA table_info('{$this->table_prefix}{$table}')");

$exists = 0; while($row = $this->fetch_array($query))	$exists = 0; while($row = $this->fetch_array($query))
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if($row['name'] == $field) { ++$exists;	if($row['name'] == $field) { ++$exists;
} }	} }
$query->closeCursor();	$query->closeCursor();

if($exists > 0)	if($exists > 0)
{	{
return true;	return true;
}	}
else { return false;	else { return false;
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/** * Add a shutdown query.	/** * Add a shutdown query.
* * @param resource The query data. * @param string An optional name for the query. */ function shutdown_query($query, $name=0)	* * @param PDOStatement $query The query data. * @param string $name An optional name for the query. */ function shutdown_query($query, $name="")
{ global $shutdown_queries; if($name)	{ global $shutdown_queries; if($name)
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/** * Performs a simple select query. *	/** * Performs a simple select query. *
* @param string The table name to be queried. * @param string Comma delimetered list of fields to be selected. * @param string SQL formatted list of conditions to be matched. * @param array List of options: group by, order by, order direction, limit, limit start. * @return resource The query data.	* @param string $table The table name to be queried. * @param string $fields Comma delimetered list of fields to be selected. * @param string $conditions SQL formatted list of conditions to be matched. * @param array $options List of options: group by, order by, order direction, limit, limit start. * @return PDOStatement The query data.
/ function simple_select($table, $fields="", $conditions="", $options=array()) {	/ function simple_select($table, $fields="", $conditions="", $options=array()) {
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if(isset($options['order_by'])) { $query .= " ORDER BY ".$options['order_by'];	if(isset($options['order_by'])) { $query .= " ORDER BY ".$options['order_by'];

if(isset($options['order_dir'])) { $query .= " ".strtoupper($options['order_dir']); }	if(isset($options['order_dir'])) { $query .= " ".strtoupper($options['order_dir']); }
}	}
if(isset($options['limit_start']) && isset($options['limit']))	if(isset($options['limit_start']) && isset($options['limit']))
{	{
$query .= " LIMIT ".$options['limit_start'].", ".$options['limit'];	$query .= " LIMIT ".$options['limit_start'].", ".$options['limit'];
}	}
else if(isset($options['limit'])) { $query .= " LIMIT ".$options['limit']; } return $this->query($query);	else if(isset($options['limit'])) { $query .= " LIMIT ".$options['limit']; } return $this->query($query);
}	}
/** * Build an insert query from an array. *	/** * Build an insert query from an array. *
* @param string The table name to perform the query on. * @param array An array of fields and their values. * @return int The insert ID if available	* @param string $table The table name to perform the query on. * @param array $array An array of fields and their values. * @return int\|bool The insert ID if available or false if an error is found
*/ function insert_query($table, $array) {	*/ function insert_query($table, $array) {
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foreach($array as $field => $value) { if(isset($mybb->binary_fields[$table][$field]) && $mybb->binary_fields[$table][$field])	foreach($array as $field => $value) { if(isset($mybb->binary_fields[$table][$field]) && $mybb->binary_fields[$table][$field])
{	{
if($value[0] != 'X') // Not escaped? { $value = $this->escape_binary($value);	if($value[0] != 'X') // Not escaped? { $value = $this->escape_binary($value);
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} else {	} else {
$array[$field] = "'{$value}'";	$array[$field] = $this->quote_val($value);
} }	} }
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/** * Build one query for multiple inserts from a multidimensional array. *	/** * Build one query for multiple inserts from a multidimensional array. *
* @param string The table name to perform the query on. * @param array An array of inserts. * @return int The insert ID if available	* @param string $table The table name to perform the query on. * @param array $array An array of inserts. * @return void
*/ function insert_query_multiple($table, $array) {	*/ function insert_query_multiple($table, $array) {
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if(!is_array($array)) {	if(!is_array($array)) {
return false;	return;
} // Field names $fields = array_keys($array[0]);	} // Field names $fields = array_keys($array[0]);
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} else {	} else {
$values[$field] = "'{$value}'";	$values[$field] = $this->quote_val($value);
} } $insert_rows[] = "(".implode(",", $values).")";	} } $insert_rows[] = "(".implode(",", $values).")";
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/** * Build an update query from an array. *	/** * Build an update query from an array. *
* @param string The table name to perform the query on. * @param array An array of fields and their values. * @param string An optional where clause for the query. * @param string An optional limit clause for the query. * @param boolean An option to quote incoming values of the array. * @return resource The query data.	* @param string $table The table name to perform the query on. * @param array $array An array of fields and their values. * @param string $where An optional where clause for the query. * @param string $limit An optional limit clause for the query. * @param boolean $no_quote An option to quote incoming values of the array. * @return PDOStatement The query data.
*/ function update_query($table, $array, $where="", $limit="", $no_quote=false) {	*/ function update_query($table, $array, $where="", $limit="", $no_quote=false) {
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} else {	} else {
$query .= $comma.$field."={$quote}".$value."{$quote}";	$quoted_value = $this->quote_val($value, $quote); $query .= $comma.$field."={$quoted_value}";
} $comma = ', '; }	} $comma = ', '; }
if(!empty($where)) { $query .= " WHERE $where"; }	if(!empty($where)) { $query .= " WHERE $where"; }
$query = $this->query("UPDATE {$this->table_prefix}$table SET $query");	$query = $this->query("UPDATE {$this->table_prefix}$table SET $query");
$query->closeCursor(); return $query; }	$query->closeCursor(); return $query; } /** * @param int\|string $value * @param string $quote * * @return int\|string */ private function quote_val($value, $quote="'") { if(is_int($value)) { $quoted = $value; } else { $quoted = $quote . $value . $quote; } return $quoted; }
/** * Build a delete query. *	/** * Build a delete query. *
* @param string The table name to perform the query on. * @param string An optional where clause for the query. * @param string An optional limit clause for the query. * @return resource The query data.	* @param string $table The table name to perform the query on. * @param string $where An optional where clause for the query. * @param string $limit An optional limit clause for the query. * @return PDOStatement The query data.
*/ function delete_query($table, $where="", $limit="") {	*/ function delete_query($table, $where="", $limit="") {
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$query = $this->query("DELETE FROM {$this->table_prefix}$table $query"); $query->closeCursor(); return $query;	$query = $this->query("DELETE FROM {$this->table_prefix}$table $query"); $query->closeCursor(); return $query;
}	}
/** * Escape a string *	/** * Escape a string *
* @param string The string to be escaped.	* @param string $string The string to be escaped.
* @return string The escaped string. */ function escape_string($string)	* @return string The escaped string. */ function escape_string($string)
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/** * Serves no purposes except compatibility *	/** * Serves no purposes except compatibility *
	* @param PDOStatement $query * @return boolean Returns true on success, false on failure
*/ function free_result($query) {	*/ function free_result($query) {
return;	return true;
} /** * Escape a string used within a like command. *	} /** * Escape a string used within a like command. *
* @param string The string to be escaped.	* @param string $string The string to be escaped.
* @return string The escaped string. */ function escape_string_like($string)	* @return string The escaped string. */ function escape_string_like($string)
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/** * Optimizes a specific table. *	/** * Optimizes a specific table. *
* @param string The name of the table to be optimized.	* @param string $table The name of the table to be optimized.
*/ function optimize_table($table) {	*/ function optimize_table($table) {
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/** * Analyzes a specific table. *	/** * Analyzes a specific table. *
* @param string The name of the table to be analyzed.	* @param string $table The name of the table to be analyzed.
*/ function analyze_table($table) {	*/ function analyze_table($table) {
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/** * Show the "create table" command for a specific table. *	/** * Show the "create table" command for a specific table. *
* @param string The name of the table. * @return string The MySQL command to create the specified table.	* @param string $table The name of the table. * @return string The SQLite command to create the specified table.
*/ function show_create_table($table) {	*/ function show_create_table($table) {
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/** * Show the "show fields from" command for a specific table. *	/** * Show the "show fields from" command for a specific table. *
* @param string The name of the table. * @return string Field info for that table	* @param string $table The name of the table. * @return array Field info for that table
*/ function show_fields_from($table) {	*/ function show_fields_from($table) {
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/** * Returns whether or not the table contains a fulltext index. *	/** * Returns whether or not the table contains a fulltext index. *
* @param string The name of the table. * @param string Optionally specify the name of the index.	* @param string $table The name of the table. * @param string $index Optionally specify the name of the index.
* @return boolean True or false if the table has a fulltext index or not. */ function is_fulltext($table, $index="")	* @return boolean True or false if the table has a fulltext index or not. */ function is_fulltext($table, $index="")
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/** * Returns whether or not this database engine supports fulltext indexing. *	/** * Returns whether or not this database engine supports fulltext indexing. *
* @param string The table to be checked.	* @param string $table The table to be checked.
* @return boolean True or false if supported or not. */	* @return boolean True or false if supported or not. */
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/** * Returns whether or not this database engine supports boolean fulltext matching. *	/** * Returns whether or not this database engine supports boolean fulltext matching. *
* @param string The table to be checked.	* @param string $table The table to be checked.
* @return boolean True or false if supported or not. */ function supports_fulltext_boolean($table)	* @return boolean True or false if supported or not. */ function supports_fulltext_boolean($table)
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/** * Creates a fulltext index on the specified column in the specified table with optional index name. *	/** * Creates a fulltext index on the specified column in the specified table with optional index name. *
* @param string The name of the table. * @param string Name of the column to be indexed. * @param string The index name, optional.	* @param string $table The name of the table. * @param string $column Name of the column to be indexed. * @param string $name The index name, optional. * @return bool
*/ function create_fulltext_index($table, $column, $name="") {	*/ function create_fulltext_index($table, $column, $name="") {
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/** * Drop an index with the specified name from the specified table *	/** * Drop an index with the specified name from the specified table *
* @param string The name of the table. * @param string The name of the index.	* @param string $table The name of the table. * @param string $name The name of the index.
*/ function drop_index($table, $name) {	*/ function drop_index($table, $name) {
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/** * Checks to see if an index exists on a specified table *	/** * Checks to see if an index exists on a specified table *
* @param string The name of the table. * @param string The name of the index.	* @param string $table The name of the table. * @param string $index The name of the index. * @return bool Returns whether index exists
*/ function index_exists($table, $index) {	*/ function index_exists($table, $index) {
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/** * Drop an table with the specified table *	/** * Drop an table with the specified table *
* @param string The name of the table. * @param boolean hard drop - no checking * @param boolean use table prefix	* @param string $table The name of the table. * @param boolean $hard hard drop - no checking * @param boolean $table_prefix use table prefix
*/ function drop_table($table, $hard=false, $table_prefix=true) {	*/ function drop_table($table, $hard=false, $table_prefix=true) {
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/** * Renames a table *	/** * Renames a table *
* @param string The old table name * @param string the new table name * @param boolean use table prefix	* @param string $old_table The old table name * @param string $new_table the new table name * @param boolean $table_prefix use table prefix * @return PDOStatement
*/ function rename_table($old_table, $new_table, $table_prefix=true) {	*/ function rename_table($old_table, $new_table, $table_prefix=true) {
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/** * Replace contents of table with values *	/** * Replace contents of table with values *
* @param string The table * @param array The replacements * @param mixed The default field(s) * @param boolean Whether or not to return an insert id. True by default	* @param string $table The table * @param array $replacements The replacements * @param mixed $default_field The default field(s) * @return int\|PDOStatement\|bool Returns either the insert id (if a new row is inserted), the query resource (if a row is updated) or false on failure
*/	*/
function replace_query($table, $replacements=array(), $default_field="", $insert_id=true)	function replace_query($table, $replacements=array(), $default_field="")
{ global $mybb;	{ global $mybb;
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} else {	} else {
$values .= $comma."'".$value."'";	$values .= $comma.$this->quote_val($value);
} $comma = ',';	} $comma = ',';
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} else {	} else {
return $this->insert_query($table, $replacements, $insert_id);	return $this->insert_query($table, $replacements);
} } }	} } }
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/** * Sets the table prefix used by the simple select, insert, update and delete functions *	/** * Sets the table prefix used by the simple select, insert, update and delete functions *
* @param string The new table prefix	* @param string $prefix The new table prefix
*/ function set_table_prefix($prefix) {	*/ function set_table_prefix($prefix) {
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/** * Fetched the total size of all mysql tables or a specific table *	/** * Fetched the total size of all mysql tables or a specific table *
* @param string The table (optional) (ignored)	* @param string $table The table (optional) (ignored)
* @return integer the total size of all mysql tables or a specific table */ function fetch_size($table='')	* @return integer the total size of all mysql tables or a specific table */ function fetch_size($table='')
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/** * Perform an "Alter Table" query in SQLite < 3.2.0 - Code taken from http://code.jenseng.com/db/ *	/** * Perform an "Alter Table" query in SQLite < 3.2.0 - Code taken from http://code.jenseng.com/db/ *
* @param string The table (optional) * @return integer the total size of all mysql tables or a specific table	* @param string $table The table (optional) * @param string $alterdefs * @param string $fullquery * @return bool True on success, false on failure
*/ function alter_table_parse($table, $alterdefs, $fullquery="") {	*/ function alter_table_parse($table, $alterdefs, $fullquery="") {
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$tmpname = 't'.TIME_NOW; $origsql = trim(preg_replace("/[\s]+/", " ", str_replace(",", ", ", preg_replace("/[\(]/","( ", $row['sql'], 1)))); $createtemptableSQL = 'CREATE TEMPORARY '.substr(trim(preg_replace("'".$table."'", $tmpname, $origsql, 1)), 6);	$tmpname = 't'.TIME_NOW; $origsql = trim(preg_replace("/[\s]+/", " ", str_replace(",", ", ", preg_replace("/[\(]/","( ", $row['sql'], 1)))); $createtemptableSQL = 'CREATE TEMPORARY '.substr(trim(preg_replace("'".$table."'", $tmpname, $origsql, 1)), 6);
$createindexsql = array(); $i = 0;
$defs = preg_split("/[,]+/", $alterdefs, -1, PREG_SPLIT_NO_EMPTY); $prevword = $table; $oldcols = preg_split("/[,]+/", substr(trim($createtemptableSQL), strpos(trim($createtemptableSQL), '(')+1), -1, PREG_SPLIT_NO_EMPTY);	$defs = preg_split("/[,]+/", $alterdefs, -1, PREG_SPLIT_NO_EMPTY); $prevword = $table; $oldcols = preg_split("/[,]+/", substr(trim($createtemptableSQL), strpos(trim($createtemptableSQL), '(')+1), -1, PREG_SPLIT_NO_EMPTY);
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$this->error($fullquery, 'no such table: '.$table); return false; }	$this->error($fullquery, 'no such table: '.$table); return false; }
return true;
}	}
	return true;
} /** * Drops a column *	} /** * Drops a column *
* @param string The table * @param string The column name	* @param string $table The table * @param string $column The column name * @return PDOStatement
*/ function drop_column($table, $column) {	*/ function drop_column($table, $column) {
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/** * Adds a column *	/** * Adds a column *
* @param string The table * @param string The column name * @param string the new column definition	* @param string $table The table * @param string $column The column name * @param string $definition the new column definition * @return PDOStatement
*/ function add_column($table, $column, $definition) {	*/ function add_column($table, $column, $definition) {
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/** * Modifies a column *	/** * Modifies a column *
* @param string The table * @param string The column name * @param string the new column definition	* @param string $table The table * @param string $column The column name * @param string $new_definition the new column definition
*/ function modify_column($table, $column, $new_definition) {	*/ function modify_column($table, $column, $new_definition) {
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/** * Renames a column *	/** * Renames a column *
* @param string The table * @param string The old column name * @param string the new column name * @param string the new column definition	* @param string $table The table * @param string $old_column The old column name * @param string $new_column the new column name * @param string $new_definition the new column definition * @return PDOStatement
*/ function rename_column($table, $old_column, $new_column, $new_definition) {	*/ function rename_column($table, $old_column, $new_column, $new_definition) {
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/** * Fetch a list of database character sets this DBMS supports *	/** * Fetch a list of database character sets this DBMS supports *
* @return array Array of supported character sets with array key being the name, array value being display name. False if unsupported	* @return array\|bool Array of supported character sets with array key being the name, array value being display name. False if unsupported
*/ function fetch_db_charsets() {	*/ function fetch_db_charsets() {
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/** * Fetch a database collation for a particular database character set *	/** * Fetch a database collation for a particular database character set *
* @param string The database character set * @return string The matching database collation, false if unsupported	* @param string $charset The database character set * @return string\|bool The matching database collation, false if unsupported
*/ function fetch_charset_collation($charset) {	*/ function fetch_charset_collation($charset) {
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/** * Binary database fields require special attention. *	/** * Binary database fields require special attention. *
* @param string Binary value	* @param string $string Binary value
* @return string Encoded binary value */ function escape_binary($string)	* @return string Encoded binary value */ function escape_binary($string)
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/** * Unescape binary data. *	/** * Unescape binary data. *
* @param string Binary value	* @param string $string Binary value
* @return string Encoded binary value */ function unescape_binary($string)	* @return string Encoded binary value */ function unescape_binary($string)