List out all the mysql database name in php

List out all the mysql database name using follwing php code.

<?php

    error_reporting(E_ALL);

    $connection = mysql_connect('localhost', 'root', '');

    $database_list = mysql_list_dbs($connection);

    $count = mysql_num_rows($database_list);

    for($i=0;$i<$count;$i++) {

        echo mysql_db_name($db_list, $i) . "<br/>";
    }

?>