PHP 4.3.9 $_SESSION values not being retained

Problem: After calling session_start() and assigning key-value pairs to the $_SESSION array, calling print_r($_SESSION) subsequently don’t work.

Solution: Assuming your php.ini session save_handler, save_path variables are set correctly, also check for free disk space.

I spent 90 minutes trying to resolve the problem thinking it was a PHP-related issue, but in the end, nullifying the 5+ gigabytes of Apache error logs promptly resolved the problem. Doh!