mysql_select_db
(PHP 4, PHP 5)
mysql_select_db — Select a MySQL database
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_select_db()
- PDO::__construct() (part of dsn)
Description
$database_name, resource $link_identifier = NULL): boolSets the current active database on the server that's associated with the specified link identifier. Every subsequent call to mysql_query() will be made on the active database.
Parameters
-
database_name -
The name of the database that is to be selected.
-
link_identifier -
The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() had been called with no arguments. 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_select_db() example
<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Not connected : ' . mysql_error());
}
// make foo the current db
$db_selected = mysql_select_db('foo', $link);
if (!$db_selected) {
die ('Can\'t use foo : ' . mysql_error());
}
?>
Notes
Note:
For backward compatibility, the following deprecated alias may be used: mysql_selectdb()
See Also
- mysql_connect() - Open a connection to a MySQL Server
- mysql_pconnect() - Open a persistent connection to a MySQL server
- mysql_query() - Send a MySQL query
