Debug request

plugin-debug-request.php

<?php
/**
 * Plugin Name: T5 Debug Request
 */
is_admin() || add_action( 'shutdown', function() {

	if ( ! current_user_can( 'update_core' ) )
		return;

	print '<pre>REQUEST';
	print_r( $_REQUEST );

	print "\n\nSESSION";
	if ( empty ( $_SESSION ) )
		print '(no session)';
	else
		print_r( $_SESSION );

	print '</pre>';
});