I created http integration in PHP. my PHP application have no errors executing the url,but the integration or the PHP is not running. How do look at PHP logs or debug HTTP integration in general
Providing you with PHP support would be a bit out of scope, but in general you will find PHP logs in your HTTP server logs.
How to access the ChirpStack logs depends on how you have deployed ChirpStack. E.g. if you are using systemd, then this might be the command
journalctl -f -n 100 -u chirpstack.