MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
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 and related FAQ for more information. Alternatives to this function include:
mysqli_close
|
PDO: Assign the value of null to the PDO object |
bool mysql_close(resource link_identifier= =NULL);
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
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_WARNING
level error is generated.
Returns true
on success or
false
on failure.
Example 6.5 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
mysql_close
will not close persistent links created by
mysql_pconnect
.
For additional details, see the manual page on
persistent
connections.
mysql_connect
|
mysql_free_result
|