(PHP3 >= 3.0.10, PHP4 >= 4.0b4)
posix_getpgrp -- 
     Return the current process group identifier
    
Description
int posix_getpgrp (void )
     Return the process group identifier of the current process. See
     POSIX.1 and the getpgrp(2) manual page on your POSIX system for
     more information on process groups.