function mail_gonder($alici,$konu,$mesaj,$gonderen_isim,$gonderen){
    $diger = "MIME-Version: 1.0\n";
    $diger .= "Content-type: text/html; charset=utf-8\n";
    $diger .= "From: $gonderen_isim <$gonderen>\n";
    $diger .= "Reply-To: $gonderen_isim <$gonderen>";
return mail($alici, $konu, $mesaj, $diger);
}