Troubleshooting “Warning: session_start(): Cannot send session cache limiter - headers already sent”

Question

i am getting Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at error

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Answer 1

This started for me when I redirected my site to https:// (for SSL Certificate). From my experience with this issue, the session_start() had to be before the browser saw any HTML code. For my example, I was using session_start() in nav.php to determine the options of the navigation bar. I ended up placing session_start() right after the php comments in the index.php file and every page which called nav.php. I was able to keep the php comments before session_start() but could not keep the HTML comments above the php.