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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