I'm still inexperienced as a web developer so I have exhausted my knowledge on my current problem.
I recently made changes to files on my one website and uploaded them via FTP to the server. When I go to the website it's still executing the old code.
I cleared all my cache and tried on different devices. Even after changing the file names for example "logout.php" to "logout_code.php" as well as link references to those names when I click on the logout button it still goes to "logout.php".
Can anybody shed some light?
Try setting a no-cache header on the page that redirects to the logout page.
header('Expires: Sun, 01 Jan 2014 00:00:00 GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', FALSE);
header('Pragma: no-cache');
The above snippet goes at the top of the page before any other output is sent. (within a <?php ?> tag of course)