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    EvTimer::__construct

    (PECL ev >= 0.2.0)

    EvTimer::__construct — Constructs an EvTimer watcher object

    説明

    public EvTimer::__construct(
         float $after ,
         float $repeat ,
         callable $callback ,
         mixed $data = null ,
         int $priority = 0
    )

    Constructs an EvTimer watcher object.

    パラメータ

    after

    Configures the timer to trigger after after seconds.

    repeat

    If repeat is 0.0 , then it will automatically be stopped once the timeout is reached. If it is positive, then the timer will automatically be configured to trigger again every repeat seconds later, until stopped manually.

    callback

    See Watcher callbacks .

    data

    Custom data associated with the watcher.

    priority

    Watcher priority

    例

    例1 Simple timers

    <?php
    // Create and start timer firing after 2 seconds
    $w1 = new EvTimer(2, 0, function () {
    echo     "2 seconds elapsed\n";
    });

    // Create and launch timer firing after 2 seconds repeating each second
    // until we manually stop it
    $w2 = new EvTimer(2, 1, function ($w) {
    echo     "is called every second, is launched after 2 seconds\n";
    echo     "iteration = ", Ev::iteration(), PHP_EOL;

    // Stop the watcher after 5 iterations
    Ev::iteration() == 5 and $w->stop();
    // Stop the watcher if further calls cause more than 10 iterations
    Ev::iteration() >= 10 and $w->stop();
    });

    // Create stopped timer. It will be inactive until we start it ourselves
    $w_stopped = EvTimer::createStopped(10, 5, function($w) {
    echo     "Callback of a timer created as stopped\n";

    // Stop the watcher after 2 iterations
    Ev::iteration() >= 2 and $w->stop();
    });

    // Loop until Ev::stop() is called or all of watchers stop
    Ev::run();

    // Start and look if it works
    $w_stopped->start();
    echo     "Run single iteration\n";
    Ev::run(Ev::RUN_ONCE);

    echo     "Restart the second watcher and try to handle the same events, but don't block\n";
    $w2->again();
    Ev::run(Ev::RUN_NOWAIT);

    $w = new EvTimer(10, 0, function() {});
    echo     "Running a blocking loop\n";
    Ev::run();
    echo     "END\n";
    ?>

    上の例の出力は、 たとえば以下のようになります。

    2 seconds elapsed
is called every second, is launched after 2 seconds
iteration = 1
is called every second, is launched after 2 seconds
iteration = 2
is called every second, is launched after 2 seconds
iteration = 3
is called every second, is launched after 2 seconds
iteration = 4
is called every second, is launched after 2 seconds
iteration = 5
Run single iteration
Callback of a timer created as stopped
Restart the second watcher and try to handle the same events, but don't block
Running a blocking loop
is called every second, is launched after 2 seconds
iteration = 8
is called every second, is launched after 2 seconds
iteration = 9
is called every second, is launched after 2 seconds
iteration = 10
END

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    User Contributed Notes 1 note

    up
    2
    Jayesh Wadhwani
    11 years ago
    Example of passing custom data:

    <?php
    // Create and start timer firing after 2 seconds with custom data
    $w1 = new EvTimer(2, 0, function ($w) {
    echo     "Custom data: $w->data\n";
    echo     "2 seconds elapsed\n";
    },     'abcd');
    Ev::run();
    ?>
    Running this will print out:
    Custom data: abcd
    2 seconds elapsed

    Note that 'data' is a public property of the event EvWatcher class.
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