PHP-Handbuch: Retrieve an item

Beschreibung

public mixed Memcached::get ( string $key [, callable $cache_cb [, float &$cas_token ]] )

Memcached::get returns the item that was previously stored under the key. If the item is found and cas_token variable is provided, it will contain the CAS token value for the item. See Memcached::cas for how to use CAS tokens. Read-through caching callback may be specified via cache_cb parameter.

Parameter-Liste

key: The key of the item to retrieve.
cache_cb: Read-through caching callback or NULL.
cas_token: The variable to store the CAS token in.

Rückgabewerte

Returns the value stored in the cache or FALSE otherwise. The Memcached::getResultCode will return Memcached::RES_NOTFOUND if the key does not exist.

Beispiele

Beispiel #1 Memcached::get example #1


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

$m->set('foo', 100);
var_dump($m->get('foo'));
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

int(100)

Beispiel #2 Memcached::get example #2


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

if (!($ip = $m->get('ip_block'))) {
    if ($m->getResultCode() == Memcached::RES_NOTFOUND) {
        $ip = array();
        $m->set('ip_block', $ip);
    } else {
        /* log error */
        /* ...       */
    }
}
?>

Siehe auch

Memcached::getByKey
Memcached::getMulti
Memcached::getDelayed