PHP Session Code Recommendations

I am using php 5.4.24 and I need to update my session code as there are a few issues starting to occur, but only in IE 11. I am looking for recommendations for php session code whether it’s a link to a recent article or just basic session code I can use to update my site. I am not storing any session data in a database so I just need bare bones session code. Any recommendations are appreciated.

>>> few issues starting to occur, but only in IE 11
Please expand upon the exact issues that are being encountered.

>>> I am looking for recommendations for php session code
Have you tried the online PHP Manual:

I have a few users on IE 11 who have their browser session end abruptly when they execute an action on the page that results in the form submitting itself to the same page resulting in them having to login again. I am not using session_register or any other functions that will not wk with php 5.4. The session code was written by another developer several years (>5) ago and so I was wanting a recommendation on a good article/tutorial. The php manual is always a great place to start and reference. Thx for the recommendations.