<?php
//Attempt to connect to the default database server
$link = mysql_connect("mysql_host", "mysql_user", "mysql_password")
or die ("Could not connect");
//Returns result pointer containing available databases
$db_list = mysql_list_dbs($link);
//print each database returned by mysql_list_dbs function
while ($row = mysql_fetch_object($db_list)) {
echo $row->Database . "\n";
}
?>