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59c06b17 CS |
1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
2 | /** | |
3 | * CodeIgniter | |
4 | * | |
5 | * An open source application development framework for PHP 5.1.6 or newer | |
6 | * | |
7 | * @package CodeIgniter | |
8 | * @author ExpressionEngine Dev Team | |
9 | * @copyright Copyright (c) 2006 - 2012 EllisLab, Inc. | |
10 | * @license http://codeigniter.com/user_guide/license.html | |
11 | * @link http://codeigniter.com | |
12 | * @since Version 2.0 | |
13 | * @filesource | |
14 | */ | |
15 | ||
16 | // ------------------------------------------------------------------------ | |
17 | ||
18 | /** | |
19 | * CodeIgniter APC Caching Class | |
20 | * | |
21 | * @package CodeIgniter | |
22 | * @subpackage Libraries | |
23 | * @category Core | |
24 | * @author ExpressionEngine Dev Team | |
25 | * @link | |
26 | */ | |
27 | ||
28 | class CI_Cache_apc extends CI_Driver { | |
29 | ||
30 | /** | |
31 | * Get | |
32 | * | |
33 | * Look for a value in the cache. If it exists, return the data | |
34 | * if not, return FALSE | |
35 | * | |
36 | * @param string | |
37 | * @return mixed value that is stored/FALSE on failure | |
38 | */ | |
39 | public function get($id) | |
40 | { | |
41 | $data = apc_fetch($id); | |
42 | ||
43 | return (is_array($data)) ? $data[0] : FALSE; | |
44 | } | |
45 | ||
46 | // ------------------------------------------------------------------------ | |
47 | ||
48 | /** | |
49 | * Cache Save | |
50 | * | |
51 | * @param string Unique Key | |
52 | * @param mixed Data to store | |
53 | * @param int Length of time (in seconds) to cache the data | |
54 | * | |
55 | * @return boolean true on success/false on failure | |
56 | */ | |
57 | public function save($id, $data, $ttl = 60) | |
58 | { | |
59 | return apc_store($id, array($data, time(), $ttl), $ttl); | |
60 | } | |
61 | ||
62 | // ------------------------------------------------------------------------ | |
63 | ||
64 | /** | |
65 | * Delete from Cache | |
66 | * | |
67 | * @param mixed unique identifier of the item in the cache | |
68 | * @param boolean true on success/false on failure | |
69 | */ | |
70 | public function delete($id) | |
71 | { | |
72 | return apc_delete($id); | |
73 | } | |
74 | ||
75 | // ------------------------------------------------------------------------ | |
76 | ||
77 | /** | |
78 | * Clean the cache | |
79 | * | |
80 | * @return boolean false on failure/true on success | |
81 | */ | |
82 | public function clean() | |
83 | { | |
84 | return apc_clear_cache('user'); | |
85 | } | |
86 | ||
87 | // ------------------------------------------------------------------------ | |
88 | ||
89 | /** | |
90 | * Cache Info | |
91 | * | |
92 | * @param string user/filehits | |
93 | * @return mixed array on success, false on failure | |
94 | */ | |
95 | public function cache_info($type = NULL) | |
96 | { | |
97 | return apc_cache_info($type); | |
98 | } | |
99 | ||
100 | // ------------------------------------------------------------------------ | |
101 | ||
102 | /** | |
103 | * Get Cache Metadata | |
104 | * | |
105 | * @param mixed key to get cache metadata on | |
106 | * @return mixed array on success/false on failure | |
107 | */ | |
108 | public function get_metadata($id) | |
109 | { | |
110 | $stored = apc_fetch($id); | |
111 | ||
112 | if (count($stored) !== 3) | |
113 | { | |
114 | return FALSE; | |
115 | } | |
116 | ||
117 | list($data, $time, $ttl) = $stored; | |
118 | ||
119 | return array( | |
120 | 'expire' => $time + $ttl, | |
121 | 'mtime' => $time, | |
122 | 'data' => $data | |
123 | ); | |
124 | } | |
125 | ||
126 | // ------------------------------------------------------------------------ | |
127 | ||
128 | /** | |
129 | * is_supported() | |
130 | * | |
131 | * Check to see if APC is available on this system, bail if it isn't. | |
132 | */ | |
133 | public function is_supported() | |
134 | { | |
135 | if ( ! extension_loaded('apc') OR ini_get('apc.enabled') != "1") | |
136 | { | |
137 | log_message('error', 'The APC PHP extension must be loaded to use APC Cache.'); | |
138 | return FALSE; | |
139 | } | |
140 | ||
141 | return TRUE; | |
142 | } | |
143 | ||
144 | // ------------------------------------------------------------------------ | |
145 | ||
146 | ||
147 | } | |
148 | // End Class | |
149 | ||
150 | /* End of file Cache_apc.php */ | |
151 | /* Location: ./system/libraries/Cache/drivers/Cache_apc.php */ |