<?php/** * OpenID protocol key-value/comma-newline format parsing and * serialization * * PHP versions 4 and 5 * * LICENSE: See the COPYING file included in this distribution. * * @access private * @package OpenID * @author JanRain, Inc. <openid@janrain.com> * @copyright 2005-2008 Janrain, Inc. * @license http://www.apache.org/licenses/LICENSE-2.0 Apache *//** * Container for key-value/comma-newline OpenID format and parsing */class Auth_OpenID_KVForm {    /**     * Convert an OpenID colon/newline separated string into an     * associative array     *     * @static     * @access private     */    function toArray($kvs, $strict=false)    {        $lines = explode("\n", $kvs);        $last = array_pop($lines);        if ($last !== '') {            array_push($lines, $last);            if ($strict) {                return false;            }        }        $values = array();        for ($lineno = 0; $lineno < count($lines); $lineno++) {            $line = $lines[$lineno];            $kv = explode(':', $line, 2);            if (count($kv) != 2) {                if ($strict) {                    return false;                }                continue;            }            $key = $kv[0];            $tkey = trim($key);            if ($tkey != $key) {                if ($strict) {                    return false;                }            }            $value = $kv[1];            $tval = trim($value);            if ($tval != $value) {                if ($strict) {                    return false;                }            }            $values[$tkey] = $tval;        }        return $values;    }    /**     * Convert an array into an OpenID colon/newline separated string     *     * @static     * @access private     */    function fromArray($values)    {        if ($values === null) {            return null;        }        ksort($values);        $serialized = '';        foreach ($values as $key => $value) {            if (is_array($value)) {                list($key, $value) = array($value[0], $value[1]);            }            if (strpos($key, ':') !== false) {                return null;            }            if (strpos($key, "\n") !== false) {                return null;            }            if (strpos($value, "\n") !== false) {                return null;            }            $serialized .= "$key:$value\n";        }        return $serialized;    }}?>