gistfile1.txt

<?php
$url = 'https://verifier.login.persona.org/verify';
$data = 'assertion='.$_POST['assertion'].'&audience=http://persona.localhost:80';

$params = array('http' => array(
              'method' => 'POST',
              'content' => $data
            ),
            'ssl' => array('verify_peer' => true
                'verify_host' => true));

$result = file_get_contents($url, false, $context);