. PHP Manual . Prev . Next . (3.0.10 - 3.0.18 only, PHP 4 >= 4.0.0) posix_getsid -- Get the current sid of the process . int posix_getsid ( int pid) . Return the sid of the process pid . If pid is 0, the sid of the current process is returned. This is not a POSIX function, but is common on System V systems. If your system does not support this function at system level, this PHP function will always return FALSE . Prev . Home . Next . posix_getpgid . Up . posix_uname