<?php
header("Cache-Control: no-cache");
header("Content-type:text/vnd.wap.wml");

if (!$_GET['a']){
	echo '<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.2//EN" "http://www.wapforum.org/DTD/wml12.dtd">'.
'<wml><card title="Card">'.
'<p align="center"><a href="test.php?a=go">GO</a>'.
'</p></card></wml>';
} else {
echo '<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.2//EN" "http://www.wapforum.org/DTD/wml12.dtd">'.
'<wml><card title="Card">'.
'<p align="center">';
$ref = getenv('HTTP_REFERER') ? getenv('HTTP_REFERER') : 'n/a';
echo 'Referrer: '.$ref.
'</p></card></wml>';	
}
?>