EvPeriodic::__construct

(PECL ev >= 0.2.0)

EvPeriodic::__construct — Constructs EvPeriodic watcher object

说明

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.

参数

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

返回值

Returns EvPeriodic object on success.

范例

示例 #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();
?>

示例 #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();
?>

示例 #3 Hourly watcher

<?php
$hourly = EvPeriodic(0, 3600, NULL, function () {
 echo "once per hour\n";
});
?>

参见