This can be used to stop the running of your script, and await responses on the connected socket. To step the program, just send enter (a blank line), or enter a php command to be executed.
debug_levelAn integer which is formed by adding together the XXX_TRACE constants.
It is not recommended to use MEMORY_TRACE. It is very slow and does not appear to be accurate. ASSIGNMENT_TRACE is not implemented yet.
To turn on all functional traces (TIMING, FUNCTIONS, ARGS SUMMARY (like strace -c)) use the value 99