# s2member/110926/includes/classes/systematics.inc.php

s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions, version 110926. 87 lines.

- Page: https://pluginprobe.com/plugins/s2member/110926/code/includes/classes/systematics.inc.php
- Raw: https://pluginprobe.com/plugins/s2member/110926/raw/includes/classes/systematics.inc.php
- Modified: 2011-09-27T01:36:16+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/s2member/110926/code/includes/classes/systematics.inc.php#L10-L20`.

```php
<?php
/**
* Systematics *( for current page )*.
*
* Copyright: © 2009-2011
* {@link http://www.websharks-inc.com/ WebSharks, Inc.}
* ( coded in the USA )
*
* Released under the terms of the GNU General Public License.
* You should have received a copy of the GNU General Public License,
* along with this software. In the main directory, see: /licensing/
* If not, see: {@link http://www.gnu.org/licenses/}.
*
* @package s2Member\Systematics
* @since 3.5
*/
if (realpath (__FILE__) === realpath ($_SERVER["SCRIPT_FILENAME"]))
	exit ("Do not access this file directly.");
/**/
if (!class_exists ("c_ws_plugin__s2member_systematics"))
	{
		/**
		* Systematics *( for current page )*.
		*
		* @package s2Member\Systematics
		* @since 3.5
		*/
		class c_ws_plugin__s2member_systematics
			{
				/**
				* Determines if the current page is Systematic.
				*
				* @package s2Member\Systematics
				* @since 3.5
				*
				* @return bool True if Systematic, else false.
				*/
				public static function is_systematic_use_page ()
					{
						static $is_systematic; /* For optimization. */
						/**/
						if (isset ($is_systematic)) /* Already cached? This saves time. */
							{
								return $is_systematic; /* Filters will have already been applied. */
							}
						else if (is_admin ()) /* In the admin area? - All administrational pages are considered Systematic. */
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if (strcasecmp (PHP_SAPI, "CLI") === 0) /* CLI = Command Line. Normally indicates a running cron job. */
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if ($_SERVER["REMOTE_ADDR"] === $_SERVER["SERVER_ADDR"] && stripos ($_SERVER["HTTP_HOST"], "localhost") === false && strpos ($_SERVER["HTTP_HOST"], "127.0.0.1") === false && (!defined ("LOCALHOST") || !LOCALHOST))
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if (preg_match ("/\/(wp-app|wp-signup|wp-register|wp-activate|wp-login|xmlrpc)\.php/", $_SERVER["REQUEST_URI"]) || (c_ws_plugin__s2member_utils_conds::bp_is_installed () && (bp_is_register_page () || bp_is_activation_page ())))
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if ($GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["membership_options_page"] && is_page ($GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["membership_options_page"]))
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if ($GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["login_welcome_page"] && is_page ($GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["login_welcome_page"]))
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if ($GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["login_redirection_override"] && ($login_redirection_uri = c_ws_plugin__s2member_login_redirects::login_redirection_uri (false, "root-returns-false")) && preg_match ("/^" . preg_quote ($login_redirection_uri, "/") . "$/", $_SERVER["REQUEST_URI"]))
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if ($GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["file_download_limit_exceeded_page"] && is_page ($GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["file_download_limit_exceeded_page"]))
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else if (!empty ($_SERVER["QUERY_STRING"]) && strpos ($_SERVER["QUERY_STRING"], "s2member") === 0 && c_ws_plugin__s2member_utils_conds::is_site_root ($_SERVER["REQUEST_URI"]))
							{
								return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", true, get_defined_vars ()));
							}
						else /* Otherwise, we return false ( it's NOT Systematic ). */
							return ($is_systematic = apply_filters ("ws_plugin__s2member_is_systematic_use_page", false, get_defined_vars ()));
					}
			}
	}
?>
```