Memcached::get

(PECL memcached >= 0.1.0)

Memcached::getRetrieve an item

Beschreibung

public Memcached::get ( string $key [, callable $cache_cb [, int $$flags ]] ) : mixed

Memcached::get() returns the item that was previously stored under the key. If the item is found and the flags is given Memcached::GET_EXTENDED, it will also return 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.

flags

Flags to control the returned result. When Memcached::GET_EXTENDED is given, the function will also return the CAS token.

Rückgabewerte

Returns the value stored in the cache or FALSE otherwise. If the flags is set to Memcached::GET_EXTENDED, an array containing the value and the CAS token is returned instead of only the value. 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 */
        /* ...       */
    
}
}
?>

Changelog

Version Beschreibung
3.0.0 The &cas_token parameter was removed. Instead flags was added and when it is given the value of Memcached::GET_EXTENDED it will ensure the CAS token to be fetched.

Siehe auch