Subversion-Projekte lars-tiefland.php_share

<?php

/**

 * Net_UserAgent_Detect_APC.php

 *

 * PHP version 4.2

 *

 * Copyright (c) 1997-2003 The PHP Group

 *

 * This source file is subject to version 2.0 of the PHP license,

 * that is bundled with this package in the file LICENSE, and is

 * available at through the world-wide-web at

 * http://www.php.net/license/2_02.txt.

 * If you did not receive a copy of the PHP license and are unable to

 * obtain it through the world-wide-web, please send a note to

 * license@php.net so we can mail you a copy immediately.

 *

 * @category Net

 * @package  Net_UserAgent

 * @author   Lucas Nealan <lucas@facebook.com>

 * @license  http://www.php.net/license/2_02.txt PHP 2.0 Licence

 * @version  CVS: $Id: APC.php 281797 2009-06-08 04:49:23Z clockwerx $

 * @link     http://pear.php.net/package/Net_UserAgent_Detect

 */

require_once 'Net/UserAgent/Detect.php';

/**

 * Net_UserAgent_Detect_APC

 *

 * PHP version 4.2

 *

 * Copyright (c) 1997-2003 The PHP Group

 *

 * This source file is subject to version 2.0 of the PHP license,

 * that is bundled with this package in the file LICENSE, and is

 * available at through the world-wide-web at

 * http://www.php.net/license/2_02.txt.

 * If you did not receive a copy of the PHP license and are unable to

 * obtain it through the world-wide-web, please send a note to

 * license@php.net so we can mail you a copy immediately.

 *

 * @category Net

 * @package  Net_UserAgent

 * @author   Lucas Nealan <lucas@facebook.com>

 * @license  http://www.php.net/license/2_02.txt PHP 2.0 Licence

 * @link     http://pear.php.net/package/Net_UserAgent_Detect

 */

class Net_UserAgent_Detect_APC extends Net_UserAgent_Detect

{

    var $key = '';

    /**

     * Class constructor

     *

     * @param string $in_userAgent    (optional) User agent override.

     * @param mixed  $in_detect       (optional) The level of checking to do.

     * @param mixed  $ua_cache_window Unknown

     */

    function Net_UserAgent_Detect_APC($in_userAgent = null, $in_detect = null,

                                      $ua_cache_window = 600)

    {

        $data     = '';

        $restored = false;

        // don't cache after time period

        $ua_cache_timeout = apc_fetch('useragent:cache_timeout');

        if ($ua_cache_window > 0) {

            if (!$ua_cache_timeout) {

                // check apc uptime and disable after x mins

                $apc_data = apc_cache_info('file', true);

                if (isset($apc_data['start_time'])) {

                    $uptime = $apc_data['start_time'];

                    // timeout and disable after 10 minutes of uptime

                    if (time() - $uptime > $ua_cache_window) {

                        apc_store('useragent:cache_timeout', true);

                        $ua_cache_timeout = true; // don't cache this one either

                    }

                }

            }

            if (!$this->key) {

                $key_flags = '';

                if ($in_detect !== null) {

                    $key_flags = implode('-', $in_detect);

                }

                $this->key = 'useragent:'.md5($in_userAgent.$key_flags);

            }

            if ($data = apc_fetch($this->key)) {

                $success = null;

                $data    = unserialize($data);

                if ($data) {

                    $restored = $this->cacheRestore($data);

                }

            }

        }

        if (!$data) {

            $this->detect($in_userAgent, $in_detect);

            if ($ua_cache_window > 0 && !$ua_cache_timeout) {

                $this->cacheSave();

            }

        }

    }

    /**

     * To be used in place of the contructor to return only open instance.

     *

     * @param string $in_userAgent (optional) User agent override.

     * @param mixed  $in_detect    (optional) The level of checking to do.

     *

     * @access public

     * @return object Net_UserAgent_Detect instance

     */

    function &singleton($in_userAgent = null, $in_detect = null)

    {

        static $instance;

        if (!isset($instance)) {

            $instance = new Net_UserAgent_Detect_APC($in_userAgent, $in_detect);

        }

        return $instance;

    }

    /**

     * Restore cached items

     *

     * @param mixed[] $cache An array of items to restore

     *

     * @return bool

     */

    function cacheRestore($cache)

    {

        if (is_array($cache)) {

            foreach ($cache as $prop => $value) {

                $ptr = Net_UserAgent_Detect::_getStaticProperty($prop);

                $ptr = $value;

            }

            return true;

        }

        return false;

    }

    /**

     * Store items in APC

     *

     * @return void

     */

    function cacheSave()

    {

        if ($this->key) {

            $items = array('browser',

                          'features',

                          'leadingIdentifier',

                          'majorVersion',

                          'options',

                          'os',

                          'quirks',

                          'subVersion',

                          'userAgent',

                          'version');

            $data = array();

            foreach ($items as $item) {

                $data[$item] = Net_UserAgent_Detect::_getStaticProperty($item);

            }

            apc_store($this->key, serialize($data));

        }

    }

}

?>