Answers for "php import"

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 once inside a function?

//yes this works 
  function derp(){include_once(yourfile.php);}