(3.0.10 - 3.0.18 only, PHP 4 >= 4.0.0)
posix_getpgid -- Get process group id for job control
Description
int posix_getpgid (int pid)
Returns the process group identifier of the process
pid.
This is not a POSIX function, but is common on BSD and System V
systems. If your system does not support this function at system
level, this PHP function will always return FALSE.