EvPeriodic::__construct
(PECL ev >= 0.2.0)
EvPeriodic::__construct — Constructs EvPeriodic watcher object
說明
public EvPeriodic::__construct(
float
string
callable
callable
mixed
int
)
float
$offset ,string
$interval ,callable
$reschedule_cb ,callable
$callback ,mixed
$data = null ,int
$priority = 0 )
Constructs EvPeriodic watcher object and starts it automatically. EvPeriodic::createStopped() method creates stopped periodic watcher.
參數
-
offset -
interval -
reschedule_cb Reschedule callback. You can pass
null. See Periodic watcher operation modes-
callback See Watcher callbacks .
-
data Custom data associated with the watcher.
-
priority
範例
示例 #1 Periodic timer. Use reschedule callback
<?php
// Tick each 10.5 seconds
function reschedule_cb ($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";
});
?> 參見
- Periodic watcher operation modes
- EvTimer
- EvPeriodic::createStopped() - Create a stopped EvPeriodic watcher