mysql_close
(PHP 4, PHP 5)
mysql_close — Close MySQL connection
This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide. Alternatives to this function include:
- mysqli_close()
- PDO: Assign the value of
nullto the PDO object
Description
$link_identifier = NULL): bool
mysql_close() closes the non-persistent connection to
the MySQL server that's associated with the specified link identifier. If
link_identifier isn't specified, the last opened
link is used.
Open non-persistent MySQL connections and result sets are automatically destroyed when a PHP script finishes its execution. So, while explicitly closing open connections and freeing result sets is optional, doing so is recommended. This will immediately return resources to PHP and MySQL, which can improve performance. For related information, see freeing resources
Parameters
-
link_identifier -
The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no connection is found or established, an
E_WARNINGlevel error is generated.
Return Values
Returns true on success or false on failure.
Examples
Example #1 mysql_close() example
<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully';
mysql_close($link);
?>
The above example will output:
Connected successfully
Notes
Note:
mysql_close() will not close persistent links created by mysql_pconnect(). For additional details, see the manual page on persistent connections.
See Also
- mysql_connect() - Open a connection to a MySQL Server
- mysql_free_result() - Free result memory
