apcu_dec

    (PECL apcu >= 4.0.0)

    apcu_dec — Decrease a stored number

    Descrizione

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

    Decreases a stored integer value.

    Elenco dei parametri

    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).

    Valori restituiti

    Returns the current value of key's value on success, o false in caso di fallimento

    Esempi

    Example #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);
    ?>

    Il precedente esempio visualizzerà qualcosa simile a:

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

bool(false)
bool(false)

    Vedere anche:

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