Answers for "php require file from other"

include and require in php

// Include a file, if it can't be found: continue.
<?php
include 'mainfile.php';
?>
  
// Alternatively: Require a file to be imported or quit if it can't be found
<?php
 require 'requiredfile.php';
?>

php include file from file included before

require_once __DIR__ . '/include_two.php';