<?php
 function url_var($adres)
    {
        $ch = curl_init($adres);
        curl_setopt($ch, CURLOPT_NOBODY, true);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
        curl_exec($ch);
        $retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);   
        curl_close($ch);
        if($retcode==200)
        {
            return true;
        }else{           
            return false;
        }
    }   
	
	if(url_var("http://www.mynet.com"))
{
     echo "Sayfa var, çalışıyor";
}else{
    echo "Sayfa kapanmış !";
}
?>