(PECL event >= 1.2.6-beta)
Event::__construct — Constructs Event object
$base
   ,$fd
   ,$what
   ,$cb
   ,$arg
     = NULL
   Constructs Event object.
base
    The event base to associate with.
fd
    
      stream resource, socket resource, or numeric file descriptor. For timer
      events pass
      -1.
      For signal events pass the signal number, e.g.
      SIGHUP.
     
what
    Event flags. See Event flags.
cb
    The event callback. See Event callbacks.
arg
    Custom data. If specified, it will be passed to the callback when event triggers.
