php man page for inotify_add_watch

INOTIFY_ADD_WATCH(3)							 1						      INOTIFY_ADD_WATCH(3)

inotify_add_watch - Add a watch to an initialized inotify instance

SYNOPSIS
       int inotify_add_watch (resource	$inotify_instance, string  $pathname, int  $mask)

DESCRIPTION
       inotify_add_watch(3) adds a new watch or modify an existing watch for the file or directory specified in $pathname.

	Using  inotify_add_watch(3) on a watched object replaces the existing watch. Using the IN_MASK_ADD constant adds (OR) events to the exist-
       ing watch.

PARAMETERS
	      o $inotify_instance
		- Resource returned by inotify_init(3)

	      o $pathname
		- File or directory to watch

	      o $mask
		- Events to watch for. See Predefined Constants.

RETURN VALUES
	The return value is a unique (inotify instance wide) watch descriptor.

SEE ALSO
       inotify_init(3).

PHP Documentation Group 												      INOTIFY_ADD_WATCH(3)