Header already send

[boomcar69]

Hello,

I tried to use your script, but it is not working for me.
I getting errors like:
session_start(): Session cannot be started after headers have already been sent in .....
I placed the code above the tag and it showing me the adblock enabled message, when i turn adblocker off, it still showing the adblocker enabled message.

Then i get other errors

Undefined variable $_SESSION in /home/xxxxxxx/public_html/block/no-adblock.php on line 8
[03-Oct-2023 08:12:27 UTC] PHP Warning: Trying to access array offset on value of type null in /home/xxxxxxx/public_html/block/no-adblock.php on line 8

Thanks