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<?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));
}
}
}
?>
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