EvPeriodic::__construct

(PECL ev >= 0.2.0)

EvPeriodic::__construct — Constructs EvPeriodic watcher object

Description

public EvPeriodic::__construct(
float $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: See Periodic watcher operation modes
interval: See Periodic watcher operation modes
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: Watcher priority

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";
});
?>

Found A Problem?

Learn How To Improve This Page • Submit a Pull Request • Report a Bug

+add a note

User Contributed Notes 1 note

down

1187328898 at qq dot com ¶

7 years ago

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();