grab url blogger

<?php
function a_grabblogurl($url){
@define(ch,curl_init());
curl_setopt(ch,CURLOPT_URL,$url);
curl_setopt(ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt(ch,CURLOPT_USERAGENT,"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)");
curl_setopt(ch,CURLOPT_FOLLOWLOCATION,1);
curl_setopt(ch,CURLOPT_BINARYTRANSFER,1);
$exec = curl_exec(ch);
preg_match_all("/http:\/\/".$url."\/[0-9]{4}\/[0-9]{2}(.*)\.html/",$exec,$u,PREG_PATTERN_ORDER);
return $u;
}
function a_simpan($u){
    $fp = fopen("list.txt","a");
    fwrite($fp,$u."\n");
    fclose($fp);
}
$url = a_grabblogurl($argv[1]);
$urlx = array_unique($url[0]);
foreach($urlx as $u){
    echo $u. "\n";
    a_simpan($u);
}