s2member / includes / classes / cache.inc.php

cache.inc.php in s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions 110710, at includes/classes/cache.inc.php

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1	<?php
2	/**
3	* s2Member's caching routines.
4	*
5	* Copyright: © 2009-2011
6	* {@link http://www.websharks-inc.com/ WebSharks, Inc.}
7	* ( coded in the USA )
8	*
9	* Released under the terms of the GNU General Public License.
10	* You should have received a copy of the GNU General Public License,
11	* along with this software. In the main directory, see: /licensing/
12	* If not, see: {@link http://www.gnu.org/licenses/}.
13	*
14	* @package s2Member\Cache
15	* @since 3.5
16	*/
17	if (realpath (__FILE__) === realpath ($_SERVER["SCRIPT_FILENAME"]))
18	exit("Do not access this file directly.");
19	/**/
20	if (!class_exists ("c_ws_plugin__s2member_cache"))
21	{
22	/**
23	* s2Member's caching routines.
24	*
25	* @package s2Member\Cache
26	* @since 3.5
27	*/
28	class c_ws_plugin__s2member_cache
29	{
30	/**
31	* Page links needed for Constants.
32	*
33	* Page links are cached into the s2Member options on 15 min intervals.
34	* This allows the API Constants to provide quick access to them without being
35	* forced to execute {@link http://codex.wordpress.org/Function_Reference/get_page_link get_page_link()}
36	* all the time, which piles up DB queries.
37	*
38	* @package s2Member\Cache
39	* @since 3.5
40	*
41	* @return array Array of cached Page links.
42	*/
43	public static function cached_page_links ()
44	{
45	do_action ("ws_plugin__s2member_before_cached_page_links", get_defined_vars ());
46	/**/
47	$login_welcome_page = $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["login_welcome_page"];
48	$membership_options_page = $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["membership_options_page"];
49	$file_download_limit_exceeded_page = $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["file_download_limit_exceeded_page"];
50	/**/
51	$login_welcome_page_cache = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["login_welcome_page"];
52	$membership_options_page_cache = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["membership_options_page"];
53	$file_download_limit_exceeded_page_cache = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["file_download_limit_exceeded_page"];
54	/**/
55	$links = array ("login_welcome_page" => "", "membership_options_page" => "", "file_download_limit_exceeded_page" => "");
56	/**/
57	if ($login_welcome_page_cache["page"] === $login_welcome_page && $login_welcome_page_cache["time"] >= strtotime ("-15 minutes") && $login_welcome_page_cache["link"])
58	{
59	$links["login_welcome_page"] = $login_welcome_page_cache["link"];
60	}
61	else /* Otherwise, we need to query the database using get_page_link() and update the cache. */
62	{
63	$GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["login_welcome_page"]["time"] = time ();
64	$GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["login_welcome_page"]["page"] = $login_welcome_page;
65	$links["login_welcome_page"] = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["login_welcome_page"]["link"] = get_page_link ($login_welcome_page);
66	/**/
67	$cache_needs_updating = true; /* Flag for cache update. */
68	}
69	/**/
70	if ($membership_options_page_cache["page"] === $membership_options_page && $membership_options_page_cache["time"] >= strtotime ("-15 minutes") && $membership_options_page_cache["link"])
71	{
72	$links["membership_options_page"] = $membership_options_page_cache["link"];
73	}
74	else /* Otherwise, we need to query the database using get_page_link() and update the cache. */
75	{
76	$GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["membership_options_page"]["time"] = time ();
77	$GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["membership_options_page"]["page"] = $membership_options_page;
78	$links["membership_options_page"] = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["membership_options_page"]["link"] = get_page_link ($membership_options_page);
79	/**/
80	$cache_needs_updating = true; /* Flag for cache update. */
81	}
82	/**/
83	if ($file_download_limit_exceeded_page_cache["page"] === $file_download_limit_exceeded_page && $file_download_limit_exceeded_page_cache["time"] >= strtotime ("-15 minutes") && $file_download_limit_exceeded_page_cache["link"])
84	{
85	$links["file_download_limit_exceeded_page"] = $file_download_limit_exceeded_page_cache["link"];
86	}
87	else /* Otherwise, we need to query the database using get_page_link() and update the cache. */
88	{
89	$GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["file_download_limit_exceeded_page"]["time"] = time ();
90	$GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["file_download_limit_exceeded_page"]["page"] = $file_download_limit_exceeded_page;
91	$links["file_download_limit_exceeded_page"] = $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]["file_download_limit_exceeded_page"]["link"] = get_page_link ($file_download_limit_exceeded_page);
92	/**/
93	$cache_needs_updating = true; /* Flag for cache update. */
94	}
95	/**/
96	if ($cache_needs_updating) /* Cache is also reset dynamically during back-end option updates. */
97	{
98	update_option ("ws_plugin__s2member_cache", $GLOBALS["WS_PLUGIN__"]["s2member"]["c"]["cache"]);
99	}
100	/**/
101	$scheme = (is_ssl ()) ? "https" : "http"; /* SSL mode? */
102	foreach ($links as &$link) /* Conversions for SSL and non-SSL mode. */
103	$link = preg_replace ("/^http(s)?\:\/\//i", $scheme . "://", $link);
104	/**/
105	return apply_filters ("ws_plugin__s2member_cached_page_links", $links, get_defined_vars ());
106	}
107	}
108	}
109	?>