PHP - Show file source from url query

php-showSource.php

<?php
# Including this conditional code to the top of a script allows to display it's content
# (sourcecode), highlighted, adding query string "?showSource" to the file request.
# ex: http://example.com/scriptname.php?showSource 
# fully modifiable, __FILE__ can be another local file, query can be changed....
if ($_SERVER['REQUEST_METHOD'] != 'POST' && isset($_GET['showSource'])) {
  highlight_file(__FILE__);
  die();
}
// start of script code
$normal = phpCode['here'];

// source: http://phpxmlrpc.sourceforge.net/server.php?showSource=TRUE

I did not know about highlight_file, less stupid day after day...