php man page for posix_setsid

POSIX_SETSID(3) 							 1							   POSIX_SETSID(3)

posix_setsid - Make the current process a session leader

SYNOPSIS
       int posix_setsid (void  )

DESCRIPTION
	Make the current process a session leader.

RETURN VALUES
	Returns the session id, or -1 on errors.

SEE ALSO
	The POSIX.1 and the setsid(2) manual page on the POSIX system for more information on process groups and job control. .

PHP Documentation Group 													   POSIX_SETSID(3)