Memcached::increment

    (PECL memcached >= 0.1.0)

    Memcached::increment — Increment numeric item's value

    Descrizione

    public Memcached::increment(
        string $key,
        int $offset = 1,
        int $initial_value = 0,
        int $expiry = 0
    ): int|false

    Memcached::increment() increments a numeric item's value by the specified offset. If the item's value is not numeric, an error will result. Memcached::increment() will set the item to the initial_value parameter if the key doesn't exist.

    Elenco dei parametri

    key

    The key of the item to increment.

    offset

    The amount by which to increment the item's value.

    initial_value

    The value to set the item to if it doesn't currently exist.

    expiry

    The expiry time to set on the item.

    Valori restituiti

    Returns new item's value on success o false in caso di fallimento.

    Esempi

    Example #1 Memcached::increment() example

    <?php
    $m     = new Memcached();
    $m->addServer('localhost', 11211);

    $m->set('counter', 0);
    $m->increment('counter');
    $n = $m->increment('counter', 10);
    var_dump($n);

    $m->set('counter', 'abc');
    $n = $m->increment('counter');
    // ^ will fail due to item value not being numeric
    var_dump($n);
    ?>

    Il precedente esempio visualizzerà:

    int(11)
bool(false)

    Vedere anche:

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    User Contributed Notes 5 notes

    up
    25
    Anonymous
    12 years ago
    Spent a long time frustrated with this.  If you read the patch notes carefully:- Make increment/decrement initialize value when it is not available (when using binary protocol).If you dont have the opt binary protocol set the arguments for initial value just return an error 38 - INVALID ARGUMENTS. This is not documented.
    up
    8
    jbaginski
    12 years ago
    PECL memcached < 0.2.0public int Memcached::increment ( string $key [, int $offset = 1 ] )
    up
    12
    Sam
    13 years ago
    increment does not alter the time to live of the object.
    up
    5
    Anonymous
    12 years ago
    If it'll save others some head-scratching, the PECL Memcached extension only supports initializing increment (or decrement) values from 2.0.0b2 onwards - i.e. not the version (1.0.2) that comes out of the box with Ubuntu 12.04.
    up
    0
    raheut dot rahwana at duck dot com
    2 months ago
    // Fix for "Memcached::increment(): Initial value is only supported with binary protocol"$m = new Memcached();$m->addServer('localhost', 11211);// Option 1: Or, add the key first to avoid needing initial value support$m->add($key, $initial_value, $expiry);$m->increment($key, $offset);// Option 2: Use binary protocol to support initial value in increment()$m->setOption(Memcached::OPT_BINARY_PROTOCOL, true);$m->increment($key, $offset, $initial_value, $expiry);Tested on PHP 8.4.8
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