apcu_dec

    (PECL apcu >= 4.0.0)

    apcu_dec — Decrease a stored number

    Beschreibung

    apcu_dec(
        string$key,
        int$step = 1,
        bool&$success = ?,
        int$ttl = 0
    ): int|false

    Decreases a stored integer value.

    Parameter-Liste

    key

    The key of the value being decreased.

    step

    The step, or value to decrease.

    success

    Optionally pass the success or fail boolean value to this referenced variable.

    ttl

    TTL to use if the operation inserts a new value (rather than decrementing an existing one).

    Rückgabewerte

    Returns the current value of key's value on success, Bei einem Fehler wird false zurückgegeben.

    Beispiele

    Beispiel #1 apcu_dec() example

    <?php
    echo "Let's do something with success", PHP_EOL;

    apcu_store('anumber', 42);

    echo     apcu_fetch('anumber'), PHP_EOL;

    echo     apcu_dec('anumber'), PHP_EOL;
    echo     apcu_dec('anumber', 10), PHP_EOL;
    echo     apcu_dec('anumber', 10, $success), PHP_EOL;

    var_dump($success);

    echo     "Now, let's fail", PHP_EOL, PHP_EOL;

    apcu_store('astring', 'foo');

    $ret = apcu_dec('astring', 1, $fail);

    var_dump($ret);
    var_dump($fail);
    ?>

    Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    Let's do something with success 42 41 31 21 bool(true) Now, let's fail bool(false) bool(false)

    Siehe auch

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