php man page for ncurses_doupdate

NCURSES_DOUPDATE(3)							 1						       NCURSES_DOUPDATE(3)

ncurses_doupdate - Write all prepared refreshes to terminal

SYNOPSIS
       bool ncurses_doupdate (void  )

DESCRIPTION
       Warning

	      This  function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in
	      a future release of PHP. This function should be used at your own risk.

	Compares the virtual screen to the physical screen and updates the physical screen. This way is more effective than using multiple refresh
       calls.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

PHP Documentation Group 												       NCURSES_DOUPDATE(3)