Question

I am trying to locate my php header to a specific location on receiving a GET value and if the value is incorrect, it will locate to a default location like home.php

here is what I’ve done so far

<?php
// Check which page is queried

if(isset($_GET['page'])){
    $got = $_GET['page'];
}
else {
    $got = 'home';
}

// Now goto that location

if(header('Location: '.$got.'.php')){
    header('Location: '.$got.'.php');
}
else {
    header('Location: home.php');
}
?>

Answer 1

You are probably looking for the file_exists() function.

You would do something like this;

$got = 'home';
if(isset($_GET['page']))
{
  if(file_exists($_GET['page'].".php"))
  {
    $got = $_GET['page'];
  }

}

header('Location: '.$got.'.php');
exit;

Edit
You would be better of by whitelisting the pages you would allow the users to see:

$got = 'home';
$whitelist = array('contact', 'about', 'blog', ...); // could come from your database
if(isset($_GET['page']))
{
  if(file_exists($_GET['page'].".php") && in_array($_GET['page'], $whitelist))
  {
    $got = $_GET['page'];
  }

}

header('Location: '.$got.'.php');
exit;

This ensures that only the views you allow can be accessed.