(PECL libevent >= 0.0.2)
event_timer_set — Prepare a timer event
Prepares the timer event to be used in event_add(). The
event is prepared to call the function specified by the
callback when the event timeout elapses.
After initializing the event, use event_base_set() to associate the event with its event base.
In case of matching event, these three arguments are passed to the
callback function:
fdSignal number or resource indicating the stream.
events
A flag indicating the event. This will always be
EV_TIMEOUT for timer events.
arg
Optional parameter, previously passed to
event_timer_set() as arg.
eventValid event resource.
callbackCallback function to be called when the matching event occurs.
argOptional callback parameter.
成功时返回 TRUE， 或者在失败时返回 FALSE。