If you have to do some debugging you might need to monitor a log file - without having to reload it every two seconds.

The solution is to log in to your server via SSH, and use the tail -f command, which follows changes as the file grows and prints them in the terminal.

So if your php log is located at /logs/php.log just type in

tail /logs/php.log -f

to stop it type in crtl+c