merhaba dostlar php ile referer yollamaya çalıştım ama hala kendi sitem gözüküyor nerde hatam olabilir?

<?php


function curl($url, $post=false)
{
    $user_agent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; tr; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, $post ? true : false);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post ? $post : false);
    curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_REFERER, 'https://www.siteadi.com/');
    $icerik = curl_exec($ch);
    curl_close($ch);
    return $icerik;
}

function ara($bas, $son, $yazi)
{
    @preg_match_all('/' . preg_quote($bas, '/') .
    '(.*?)'. preg_quote($son, '/').'/i', $yazi, $m);
    return @$m[1];
}
$icerik = file_get_contents("https://www.xxxxxxxxxxx/index.php?id=6345109");
$baslik = ara("file: '","',", $icerik);

?>