The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
IN_ACCESS
      (integer)
    IN_MODIFY
      (integer)
    IN_ATTRIB
      (integer)
    IN_CLOSE_WRITE
      (integer)
    IN_CLOSE_NOWRITE
      (integer)
    IN_OPEN
      (integer)
    IN_MOVED_TO
      (integer)
    IN_MOVED_FROM
      (integer)
    IN_CREATE
      (integer)
    IN_DELETE
      (integer)
    IN_DELETE_SELF
      (integer)
    IN_MOVE_SELF
      (integer)
    IN_CLOSE
      (integer)
    IN_MOVE
      (integer)
    IN_ALL_EVENTS
      (integer)
    IN_UNMOUNT
      (integer)
    IN_Q_OVERFLOW
      (integer)
    IN_IGNORED
      (integer)
    IN_ISDIR
      (integer)
    IN_ONLYDIR
      (integer)
    IN_DONT_FOLLOW
      (integer)
    IN_MASK_ADD
      (integer)
    IN_ONESHOT
      (integer)
    Note: The events marked with an asterisk (*) above can occur for files in watched directories.