gistfile1.php

<?php
$contents = file_get_contents('http://nod123.cn/');
preg_match_all('/username:\s?([A-Za-z0-9-]+)/i', $contents, $usernames);
preg_match_all('/password:\s?([A-Za-z0-9-]+)/i', $contents, $passwords);
foreach ($usernames[1] as $key => $username) {
    if (isset($passwords[1][$key])) {
        printf("%s:%s\n", $username, $passwords[1][$key]);
    }
}
?>