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    apcu_inc

    (PECL apcu >= 4.0.0)

    apcu_inc — Increase a stored number

    说明

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

    Increases a stored number.

    参数

    key

    The key of the value being increased.

    step

    The step, or value to increase.

    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 incrementing an existing one).

    返回值

    Returns the current value of key's value on success, 或者在失败时返回 false

    示例

    示例 #1 apcu_inc() example

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

    apcu_store('anumber', 42);

    echo     apcu_fetch('anumber'), PHP_EOL;

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

    var_dump($success);

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

    apcu_store('astring', 'foo');

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

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

    以上示例的输出类似于：

    Let's do something with success
42
43
53
63
bool(true)
Now, let's fail

bool(false)
bool(false)

    参见

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