posix_getpgrp
    (PHP 3>= 3.0.10, PHP 4 )
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.