Parse http headers

<?php

function http_parse_headers($headers)
{
    $return_headers = array();
    foreach (explode("\n", $headers) as $line)
    {
        if (substr($line, 0, 4) == 'HTTP')
        {
            continue;
        }

        $is_cookie = FALSE;
        if (substr($line, 0, 10) == 'Set-Cookie')
        {
            $is_cookie = TRUE;
        }

        $expl = explode(':', $line);

        if (count($expl) == 2)
        {
            if ($is_cookie)
            {
                if (!isset($return_headers[$expl[0]]))
                {
                    $return_headers[$expl[0]] = array();
                }

                preg_match_all("/^Set-Cookie: (.*?)=(.*?);/i", $line, $matches);

                if (count($matches) == 3)
                {
                    $return_headers[$expl[0]][$matches[1][0]] = trim($matches[2][0]);
                }
                else {
                    $return_headers[$expl[0]][] = trim($expl[1]);
                }
            }
            else {
                $return_headers[$expl[0]] = trim($expl[1]);
            }
        }
    }

    return $return_headers;
}

?>