EvPeriodic::__construct
(PECL ev >= 0.2.0)
EvPeriodic::__construct — Constructs EvPeriodic watcher object
Description
public
EvPeriodic::__construct
(
double
$offset
,
string
$interval
,
callable
$reschedule_cb
,
callable
$callback
[,
mixed
$data
= NULL
[,
int
$priority
= 0
]] )Constructs EvPeriodic watcher object and starts it automatically. EvPeriodic::createStopped() method creates stopped periodic watcher.
Parameters
-
offset -
interval -
reschedule_cb -
Reschedule callback. You can pass
NULL. See Periodic watcher operation modes -
callback -
See Watcher callbacks .
-
data -
Custom data associated with the watcher.
-
priority
Return Values
Returns EvPeriodic object on success.
Examples
Example #1 Periodic timer. Use reschedule callback
<?php
// Tick each 10.5 seconds
function reschedule_cb ($watcher, $now) {
return $now + (10.5. - fmod($now, 10.5));
}
$w = new EvPeriodic(0., 0., "reschedule_cb", function ($w, $revents) {
echo time(), PHP_EOL;
});
Ev::run();
?>
Example #2 Periodic timer. Tick every 10.5 seconds starting at now
<?php
// Tick every 10.5 seconds starting at now
$w = new EvPeriodic(fmod(Ev::now(), 10.5), 10.5, NULL, function ($w, $revents) {
echo time(), PHP_EOL;
});
Ev::run();
?>
Example #3 Hourly watcher
<?php
$hourly = EvPeriodic(0, 3600, NULL, function () {
echo "once per hour\n";
};
?>
See Also
- Periodic watcher operation modes
- EvTimer
- EvPeriodic::createStopped() - Create a stopped EvPeriodic watcher
Коментарии
function reschedule_cb_10s ($watcher, $now) {
return $now + 10.;
}
//PHP7.0+版本不支持reschedule_cb模式
// PHP5.6测试通过
$w5 = new EvPeriodic(0.0, 0.0, "reschedule_cb_10s", function ($w, $revents) {
echo "w5:enter:", time(), PHP_EOL;
// sleep(3);
echo "w5:end:", time(), PHP_EOL;
});
Ev::run();