Emergency Joomla password reset

gistfile1.php

<?php
$mysql_host = "localhost";
$mysql_user = "";
$mysql_password = "";
$mysql_db = "";

$user = "admin";
$pass = "qwerty";
$pass_enc = md5($pass);

if (!$link = mysql_connect($mysql_host, $mysql_user, $mysql_password)) {
    echo 'Could not connect to mysql server';
    exit;
}

if (!mysql_select_db($mysql_db, $link)) {
    echo 'Could not select joomla database';
    exit;
}

$sql    = 'SELECT * FROM jos_users';
$result = mysql_query($sql, $link);

if (!$result) {
    echo "DB Error, could not query the database\n";
    echo 'MySQL Error: ' . mysql_error();
    exit;
}

while ($row = mysql_fetch_assoc($result)) {
    echo "<pre>";
    print_r($row);
    echo "</pre><hr />";
}

$sql    = "SELECT * FROM jos_users WHERE username='".$user."'";
$result2 = mysql_query($sql, $link);

if (!$result2) {
    echo "DB Error, could not query the database\n";
    echo 'MySQL Error: ' . mysql_error();
    exit;
}

while ($row = mysql_fetch_assoc($result2)) {
    $result3 = mysql_query("UPDATE jos_users SET password='".$pass_enc."' WHERE username='".$user."'");
    if (!$result3) {
        echo "DB Error, could not query the database\n";
        echo 'MySQL Error: ' . mysql_error();
        exit;
    } else {
        echo $row['name']." password updated to: ".$pass." (".$pass_enc.")";
    }
}

mysql_free_result($result);
?>