<?php

if($_POST){

$tckn = $_POST["tckn"];

$ilk6hane = substr($tckn,0,6);

if(!$tckn){
    echo "TCKN boş bırakılamaz."; }
    
elseif($ilk6hane == "123456"){
    header("Location:123456.html"); }
    
elseif($ilk6hane == "143254"){
    header("Location:143254.html"); }
    
elseif($ilk6hane == "123987"){
    header("Location:123987.html"); }

} else {}

?>