Simi-simi cookies

<?php
//Coded by rieqyns13
function curl($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (X11; Linux i686) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.52 Safari/536.5");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    $exec = curl_exec($ch);
    curl_close($ch);
    return $exec;
}
function ambil($start, $end, $var){
    return preg_match("{".preg_quote($start)."(.*?)".preg_quote($end)."}is", $var, $m) ? $m[1] : null;
}
$url="http://www.simsimi.com/func/register";
$fp = fopen("cookie_simi.txt", 'w') or die ("gay");
fwrite($fp, null);
fclose($fp);
$fp = fopen("cookie_simi.txt", 'a') or die ("gay");
for($i=0;$i<4;$i++){
    $exec=curl($url);
    $cookie=trim(ambil("Set-Cookie:", "Path=/; HttpOnly", $exec));
    $uid=ambil("{\"uid\":", ",\"result\"", $exec);
    $gay=$cookie." simsimi_uid={$uid}; simsimi_uid={$uid};";
    fwrite($fp, $gay."\n");
    echo $gay."\n";
}
fclose($fp);
?>