EvTimer::__construct
(PECL ev >= 0.2.0)
EvTimer::__construct — Constructs an EvTimer watcher object
Description
public EvTimer::__construct ( double $after , double $repeat , callable $callback [, mixed $data = NULL [, int $priority = 0 ]] )
Constructs an EvTimer watcher object.
Parameters
after
Configures the timer to trigger after after
seconds.
repeat
If repeat is 0.0
, then it will automatically be stopped once the timeout is reached. If it is positive, then the timer will automatically be configured to trigger again every repeat seconds later, until stopped manually.
callback
See Watcher callbacks .
data
Custom data associated with the watcher.
priority
Watcher priority
Return Values
Returns EvTimer object on success.
Examples
Example #1 Simple timers
<?php
//?Create?and?start?timer?firing?after?2?seconds
$w1?=?new?EvTimer(2,?0,?function?()?{
????echo?"2?seconds?elapsed\n";
});
//?Create?and?launch?timer?firing?after?2?seconds?repeating?each?second
//?until?we?manually?stop?it
$w2?=?new?EvTimer(2,?1,?function?($w)?{
????echo?"is?called?every?second,?is?launched?after?2?seconds\n";
????echo?"iteration?=?",?Ev::iteration(),?PHP_EOL;
????//?Stop?the?watcher?after?5?iterations
????Ev::iteration()?==?5?and?$w->stop();
????//?Stop?the?watcher?if?further?calls?cause?more?than?10?iterations
????Ev::iteration()?>=?10?and?$w->stop();
});
//?Create?stopped?timer.?It?will?be?inactive?until?we?start?it?ourselves
$w_stopped?=?EvTimer::createStopped(10,?5,?function($w)?{
????echo?"Callback?of?a?timer?created?as?stopped\n";
????//?Stop?the?watcher?after?2?iterations
????Ev::iteration()?>=?2?and?$w->stop();
});
//?Loop?until?Ev::stop()?is?called?or?all?of?watchers?stop
Ev::run();
//?Start?and?look?if?it?works
$w_stopped->start();
echo?"Run?single?iteration\n";
Ev::run(Ev::RUN_ONCE);
echo?"Restart?the?second?watcher?and?try?to?handle?the?same?events,?but?don't?block\n";
$w2->again();
Ev::run(Ev::RUN_NOWAIT);
$w?=?new?EvTimer(10,?0,?function()?{});
echo?"Running?a?blocking?loop\n";
Ev::run();
echo?"END\n";
?>
The above example will output something similar to:
2 seconds elapsed
is called every second, is launched after 2 seconds
iteration = 1
is called every second, is launched after 2 seconds
iteration = 2
is called every second, is launched after 2 seconds
iteration = 3
is called every second, is launched after 2 seconds
iteration = 4
is called every second, is launched after 2 seconds
iteration = 5
Run single iteration
Callback of a timer created as stopped
Restart the second watcher and try to handle the same events, but don't block
Running a blocking loop
is called every second, is launched after 2 seconds
iteration = 8
is called every second, is launched after 2 seconds
iteration = 9
is called every second, is launched after 2 seconds
iteration = 10
END
See Also
- EvTimer::createStopped() - Creates EvTimer stopped watcher object
- EvPeriodic
← EvTimer::again
EvTimer::createStopped →
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Licensed under the Creative Commons Attribution License v3.0 or later.
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