# mysql_select_db

(PHP 4, PHP 5, PECL mysql:1.0)

mysql_select_db — Select a MySQL database

### Description

bool mysql_select_db ( string `$database_name` [, resource `$link_identifier` ] )

Sets 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() was called with no arguments. If by chance no connection is found or established, an `E_WARNING` level warning 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 downward compatibility, the following deprecated alias may be used: mysql_selectdb()

### See Also

- mysql_connect()
- mysql_pconnect()
- mysql_query()