WAS/ui/imageOverride.php

<?php
  ini_set('display_errors', 1);
  ini_set('display_startup_errors', 1);
  error_reporting(E_ALL);
  
  
  $overridden = htmlspecialchars($_GET["overridden"]);
  $urlnew = htmlspecialchars($_GET["new"]);
  
  unlink($overridden);
  rename($urlnew, $overridden);
  echo "img overriden";

  
?>