openid.php

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    {
        $pairs = array();
        foreach ($data as $key => $value) {
            if (is_array($value)) {
                $pairs[] = urlencode($value[0])."=".urlencode($value[1]);
            } else {
                $pairs[] = urlencode($key)."=".urlencode($value);
            }
        }
        return implode("&", $pairs);
    }

    /**
     * "Appends" query arguments onto a URL.  The URL may or may not
     * already have arguments (following a question mark).
     *
     * @access private
     * @param string $url A URL, which may or may not already have
     * arguments.
     * @param array $args Either an array key/value pairs or an array of
     * arrays, each of which holding two values: a key and a value,
     * sequentially.  If $args is an ordinary key/value array, the
     * parameters will be added to the URL in sorted alphabetical order;
     * if $args is an array of arrays, their order will be preserved.
     * @return string $url The original URL with the new parameters added.
     *
     */
    function appendArgs($url, $args)
    {
        if (count($args) == 0) {
            return $url;
        }

        // Non-empty array; if it is an array of arrays, use
        // multisort; otherwise use sort.
        if (array_key_exists(0, $args) &&
            is_array($args[0])) {
            // Do nothing here.
        } else {
            $keys = array_keys($args);
            sort($keys);
            $new_args = array();
            foreach ($keys as $key) {
                $new_args[] = array($key, $args[$key]);
            }
            $args = $new_args;
        }

        $sep = '?';
        if (strpos($url, '?') !== false) {
            $sep = '&';
        }

        return $url . $sep . Auth_OpenID::httpBuildQuery($args);
    }

    /**
     * Turn a string into an ASCII string.
     *
     * Replace non-ascii characters with a %-encoded, UTF-8
     * encoding. This function will fail if the input is a string and
     * there are non-7-bit-safe characters. It is assumed that the
     * caller will have already translated the input into a Unicode
     * character sequence, according to the encoding of the HTTP POST
     * or GET.
     *
     * Do not escape anything that is already 7-bit safe, so we do the
     * minimal transform on the identity URL
     *
     * @access private
     */
    function quoteMinimal($s)
    {
        $res = array();
        for ($i = 0; $i < strlen($s); $i++) {
            $c = $s[$i];
            if ($c >= "\x80") {
                for ($j = 0; $j < count(utf8_encode($c)); $j++) {
                    array_push($res, sprintf("%02X", ord($c[$j])));
                }
            } else {
                array_push($res, $c);
            }
        }
    
        return implode('', $res);
    }

    /**
     * Implements python's urlunparse, which is not available in PHP.
     * Given the specified components of a URL, this function rebuilds
     * and returns the URL.
     *
     * @access private
     * @param string $scheme The scheme (e.g. 'http').  Defaults to 'http'.
     * @param string $host The host.  Required.
     * @param string $port The port.
     * @param string $path The path.
     * @param string $query The query.
     * @param string $fragment The fragment.
     * @return string $url The URL resulting from assembling the
     * specified components.
     */
    function urlunparse($scheme, $host, $port = null, $path = '/',
                        $query = '', $fragment = '')
    {

        if (!$scheme) {
            $scheme = 'http';
        }

        if (!$host) {
            return false;
        }

        if (!$path) {
            $path = '';
        }

        $result = $scheme . "://" . $host;

        if ($port) {
            $result .= ":" . $port;
        }

        $result .= $path;

        if ($query) {
            $result .= "?" . $query;
        }

        if ($fragment) {
            $result .= "#" . $fragment;
        }

        return $result;
    }

    /**
     * Given a URL, this "normalizes" it by adding a trailing slash
     * and / or a leading http:// scheme where necessary.  Returns
     * null if the original URL is malformed and cannot be normalized.
     *
     * @access private
     * @param string $url The URL to be normalized.
     * @return mixed $new_url The URL after normalization, or null if
     * $url was malformed.
     */
    function normalizeUrl($url)
    {
        if ($url === null) {
            return null;
        }

        assert(is_string($url));

        $old_url = $url;
        $url = trim($url);

        if (strpos($url, "://") === false) {
            $url = "http://" . $url;
        }

        $parsed = @parse_url($url);

        if ($parsed === false) {
            return null;
        }

        $defaults = array(
                          'scheme' => '',
                          'host' => '',
                          'path' => '',
                          'query' => '',
                          'fragment' => '',
                          'port' => ''
                          );

        $parsed = array_merge($defaults, $parsed);

        if (($parsed['scheme'] == '') ||
            ($parsed['host'] == '')) {
            if ($parsed['path'] == '' &&
                $parsed['query'] == '') {
                return null;
            }

            $url = 'http://' + $url;
            $parsed = parse_url($url);

            $parsed = array_merge($defaults, $parsed);
        }

        $tail = array_map(array('Auth_OpenID', 'quoteMinimal'),
                          array($parsed['path'],
                                $parsed['query']));
        if ($tail[0] == '') {
            $tail[0] = '/';
        }

        $url = Auth_OpenID::urlunparse($parsed['scheme'], $parsed['host'],
                                       $parsed['port'], $tail[0], $tail[1]);

        assert(is_string($url));

        return $url;
    }

    /**
     * Replacement (wrapper) for PHP's intval() because it's broken.
     *
     * @access private
     */
    function intval($value)
    {
        $re = "/^\\d+$/";

        if (!preg_match($re, $value)) {
            return false;
        }

        return intval($value);
    }

    /**
     * Count the number of bytes in a string independently of
     * multibyte support conditions.
     *
     * @param string $str The string of bytes to count.
     * @return int The number of bytes in $str.
     */
    function bytes($str)
    {
        return strlen(bin2hex($str)) / 2;
    }

    /**
     * Get the bytes in a string independently of multibyte support
     * conditions.
     */
    function toBytes($str)
    {
        $hex = bin2hex($str);

        if (!$hex) {
            return array();
        }

        $b = array();
        for ($i = 0; $i < strlen($hex); $i += 2) {
            $b[] = chr(base_convert(substr($hex, $i, 2), 16, 10));
        }

        return $b;
    }

    function urldefrag($url)
    {
        $parts = explode("#", $url, 2);

        if (count($parts) == 1) {
            return array($parts[0], "");
        } else {
            return $parts;
        }
    }

    function filter($callback, &$sequence)
    {
        $result = array();

        foreach ($sequence as $item) {
            if (call_user_func_array($callback, array($item))) {
                $result[] = $item;
            }
        }

        return $result;
    }

    function update(&$dest, &$src)
    {
        foreach ($src as $k => $v) {
            $dest[$k] = $v;
        }
    }
}
?>