gistfile1.aw

<?php

function content($title = 0, $rq = 0) {
	// If there is no site set, we can use a default here.
	if (empty($_GET['site'])) {
		$site = 'willkommen'; // Replace this with the default site
	} else {
		$site = $_GET['site'];
	}
	// We use $site, because its bad practice to modify $_GET/$_POST
	
	$allowed_sites = array('willkommen', 'atemtherapie', 'atembehandlung', 'atemubungen'); // Fill in with the rest of the sites
	// Check whether the specified site is valid and allowed
	if (!in_array($site, $allowed_site)) {
		// Invalid site -- use the default
		$site = 'willkommen'; // Replace this with the default site
	}
	
	// Do our output
	if ($title) {
		if ($rq) {
			echo "&raquo; ";
		}
		echo ucfirst($site);
	} else {
		require 'includes/' . $site . '.html';
	}
}