Memcached::prepend

    (PECL memcached >= 0.1.0)

    Memcached::prepend — Prepend data to an existing item

    Descrizione

    public Memcached::prepend(string $key, string $value): ?bool

    Memcached::prepend() prepends the given value string to the value of an existing item. The reason that value is forced to be a string is that prepending mixed types is not well-defined.

    Nota:

    If the Memcached::OPT_COMPRESSION is enabled, the operation will fail and a warning will be issued, because prepending compressed data to a value that is potentially already compressed is not possible.

    Elenco dei parametri

    key

    The key of the item to prepend the data to.

    value

    The string to prepend.

    Valori restituiti

    Restituisce true in caso di successo, false in caso di fallimento. Returns null when compression is on.

    Errori/Eccezioni

    Returns null and raises an E_WARNING when compression is enabled.

    Esempi

    Example #1 Memcached::prepend() example

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

    $m->set('foo', 'abc');
    $m->prepend('foo', 'def');
    var_dump($m->get('foo'));
    ?>

    Il precedente esempio visualizzerà:

    string(6) "defabc"

    Vedere anche:

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