Here's what I want to do. I have 3 php files, one is a.php, b.php, and c.php. If a.php has a link to b.php, by using an href tag or by is using b.php as its form action. How would b.php know that it is a.php who is calling it? c.php is also linked to b.php. But I want to redirect the page to something else if it is not a.php who is using b.php.

Ben sadece gerçek php kodda bunu nasıl emin değilim, b.php için böyle bir şey düşünüyorum:

<?php

if(called_by('a.php')){
echo "something";
}
else{
header('location:a.php');
}

?>