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(PECL libevent >= 0.0.2)
event_timer_set — Prepare a timer event
$event
, callable $callback
[, mixed $arg
] )
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:
fd
Signal 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
.
event
Valid event resource.
callback
Callback function to be called when the matching event occurs.
arg
Optional callback parameter.
成功时返回 TRUE
, 或者在失败时返回 FALSE
。