Küçük bi hata yapmışsın:

function getstring($a,$b,$c){
$y = explode($b,$a);
$x = explode($c,$y[1]);
return $x[0];
}
// Check if form has been submitted
if($_REQUEST['txt']){
ini_set("max_execution_time", 0); // no time-outs!
ignore_user_abort(true); // Continue downloading even after user closes the browser.
//$text = stripslashes($_REQUEST['txt']);
$text = $_REQUEST['txt'];
//$text = str_replace(' ', '+', $text);
$lang1 = $_REQUEST['lang1'];
$lang2 = $_REQUEST['lang2'];
echo translate($text,$lang1,$lang2);
}
else { echo "


Boş Yazı Gönderdiniz ve Erişiminiz Yasaklandı!

Şu anda ana sayfasına yönlendiriliyorsunuz.
";
?>exit;}
function translate($text,$lang1,$lang2){

$query = "js=n&prev=_t&hl=en&ie=UTF-8&text=$text&file=&sl=$lang1&tl=$lang2";

$ch=curl_init();
//curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_URL, "http://translate.google.com/?");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $query);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0");
curl_setopt($ch, CURLOPT_ENCODING , "UTF-8");
$output = curl_exec($ch);
// echo $output;
curl_close($ch);
if ($lang2=="ar" || $lang2=="iw") {
$body = getstring($output, "overflow:auto\">", "