get url

<?php
header("Content-Type:text/plain");
//set_time_limit (0);
$dir = dirname(__FILE__);
$data = file_get_contents("$dir/full_html.htm");

// regex find url
preg_match_all('@https://fbcdn-sphotos-[a-z]+-a.akamaihd.net/hphotos-ak-[a-z0-9]+/t1.0-9/p417x417/[0-9]+_[0-9]+_[0-9]+_[a-z]+.jpg@si',$data,$url);
$url = $url['0'];

print_r ($url);

?>