The posix_getsid function returns the process group ID of the session leader.
integer posix_getuid()
The posix_getuid function returns the user ID of the user executing the PHP engine.
boolean posix_isatty (integer descriptor)
The posix_isatty function returns TRUE if the given file descriptor is a TTY.
boolean posix_kill(integer process, integer signal)
The posix_kill function sends a signal to a process.
boolean posix_mkfifo(string path, integer mode)
The posix_mkfifo function creates a FIFO file. The mode argument follows the same
rules as chmod.
boolean posix_setgid(integer group)
Use posix_setgid to change the group for the current process. Only the root user may
switch groups.
integer posix_setpgid(integer process, integer group)
The posix_setpgid function sets the process group ID for a given process.
integer posix_setsid()
The posix_setsid function creates a session and returns the process groupID.
boolean posix_setuid(integer user)
Use posix_setuid to change the user for the current process. Only the root user may
change the user ID.
array posix_times()
The posix_times function returns an array of values on system clocks. The elements of
the array are cstime, cutime, stime, ticks, and utime.
<?
foreach(posix_getrlimit() as $key=>$value)
{