Where is the php.ini file?

Hi I need to edit the php.ini file to enable compression, but I can't figure out where it is?

Or do I need to create one?

Thanks in advance.

If there isn't one in the MODX root directory, you can create one (if your host allows it).

OK thanks,

see my next post on gzip and compression

https://forums.modx.com/thread/83193/setting-gzip-compressionin-revolution#dis-post-458952