EvPeriodic::__construct

(PECL ev >= 0.2.0)

EvPeriodic::__constructConstructs 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

Example #1 Periodic timer. Use reschedule callback

<?php
// Tick each 10.5 seconds

function reschedule_cb ($watcher$now) {
 return 
$now + (10.5. - fmod($now10.5));
}

$w = new EvPeriodic(0.0."reschedule_cb", function ($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
$w = new EvPeriodic(fmod(Ev::now(), 10.5), 10.5NULL, function ($w$revents) {
 echo 
time(), PHP_EOL;
});
Ev::run();
?>

Example #3 Hourly watcher

<?php
$hourly 
EvPeriodic(03600NULL, function () {
 echo 
"once per hour\n";
});
?>

参见

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User Contributed Notes 1 note

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1187328898 at qq dot com
3 months 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();
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