Question

I have two files

1 – index.php
2 – main.php

index.php call to main.php by <?php require_once("../../includes/main.php"); ?>

How do I know from main.php when it executes,

if index.php calls to him or the same user executes it Standalone?
What should I ask inside main php to continue running the program if was require_once?

Answer 1

Another approach is to use get_included_files() – the “main” file that included the other ones will always show up on top = be the 0th element of the returned array:

if (get_included_files()[0] !== __FILE__) {
    // ..included
} else {
    // ..not included
}

This will work in most cases.