switchOn.php

<?php 

if(isset($_GET['ain'])) {
	require 'login.inc.php';

	$ch = curl_init('http://fritz.box/login_sid.lua');
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	$login = curl_exec($ch);
	$session_status_simplexml = simplexml_load_string($login);

	$challenge = $session_status_simplexml->Challenge;
	$response = $challenge . '-' . md5(mb_convert_encoding($challenge.'-'.$fritzbox_password, "UCS-2LE", "UTF-8"));
	curl_setopt($ch, CURLOPT_POSTFIELDS, "username=".$fritzbox_username."&response={$response}&page=/login_sid.lua");
	$sendlogin = curl_exec($ch);
	$session_status_simplexml = simplexml_load_string($sendlogin);
	if($session_status_simplexml->SID != '0000000000000000') {
		$SID = $session_status_simplexml->SID;
	} else {
		echo "ERROR: Login failed";
		exit;
	}
	curl_close($ch);

	$switchOn = file_get_contents('http://fritz.box/webservices/homeautoswitch.lua?switchcmd=setswitchon&sid='.$SID.'&ain='.$_GET['ain']);

	$logout = file_get_contents('http://fritz.box/login.lua?page=/home/home.lua&logout=1&sid='.$SID);
}

?>