In documentation not said that envirmoment XDEBUG_CONFIG working as trigger for start_with_request

[alexander-xyz]

I set start_with_request=trigger in config, but xdebug_is_debugger_active() all time was true (I did not use any triggers). After few hours of searching, I saw, that if XDEBUG_CONFIG is set in envirmoment (it can be any value, like empty string), it work like a trigger. So, If XDEBUG_CONFIG is setted in envirmoment - application start xdebug, otherwise - no (if no another triggers).

I think, it must be written in documentation.