Check `!defined('WPINC')`

[jaswrks]

We should alter all of the s2Member PHP files so that they check for the more dependable WPINC constant, as opposed to $_SERVER['SCRIPT_FILENAME'] which is dependent upon the underlying server; i.e. not always available.

[jaswrks]

Next Release Changelog:

• (s2Member/s2Member Pro) Security: This release of s2Member checks for the existence of the WordPress PHP Constant: WPINC instead of looking for the less reliable $_SERVER['SCRIPT_FILENAME']. Some site owners reported this was causing trouble in a localhost environment during testing, or when running s2Member on some hosts that are missing the SCRIPT_FILENAME environment variable; e.g. some Windows servers. Fixed in this release. See also: this GitHub issue if you'd like additional details.

[jaswrks]

This issue was resolved in the release of s2Member v150203. Please see: http://www.s2member.com/kb/v150203/ If there are any follow-ups needed, please open a new issue and we will investigate. Thanks!