Miscellany

<?php
    function http_parse_headers( $header )
    {
        $retVal = array();
        $fields = explode("\r\n", preg_replace('/\x0D\x0A[\x09\x20]+/', ' ', $header));

        foreach( $fields as $field ) {
            if( preg_match('/([^:]+): (.+)/m', $field, $match) ) {
                $match[1] = preg_replace('/(?<=^|[\x09\x20\x2D])./e', 'strtoupper("\0")', strtolower(trim($match[1])));
                if( isset($retVal[$match[1]]) ) {
                    if (is_array($retVal[$match[1]]))
                    {
                        array_push($retVal[$match[1]], $match[2]);
                    }
                    else
                    {
                        $retVal[$match[1]] = array($retVal[$match[1]], $match[2]);
                    }
                } else {
                    $retVal[$match[1]] = trim($match[2]);
                }
            }
        }
        return $retVal;
    }
?>