(PECL memcached >= 0.1.0)

Memcached::getRetrieve an item


public Memcached::get(string $key, ?callable $cache_cb = null, int $get_flags = 0): mixed

Memcached::get() returns the item that was previously stored under the key. If the item is found and the get_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.

Bağımsız Değişkenler


The key of the item to retrieve.


Read-through caching callback or null.


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

Dönen Değerler

Returns the value stored in the cache or false otherwise. If the get_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.

Sürüm Bilgisi

Sürüm: Açıklama
PECL memcached 3.0.0 The &cas_token parameter was removed. Instead get_flags was added and when it is given the value of Memcached::GET_EXTENDED it will ensure the CAS token to be fetched.


Örnek 1 Memcached::get() example #1

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

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

Yukarıdaki örneğin çıktısı:


Örnek 2 Memcached::get() example #2

= 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 */
/* ... */

Ayrıca Bakınız

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User Contributed Notes 3 notes

letynsoft at gmail dot com
7 years ago
As of some version of php7 (i was not able to determine which exactly).
The $cas_token is no longer valid argument. It has been removed in favor of flags argument, as it appears to be causing issues when subclassing the Memcached class.

See for more details.

Basically you need to
function memcacheGet($key, $cb = null, &$cas = null) {
$m = memcacheGetObject();
defined('Memcached::GET_EXTENDED')) {
//Incompatible change in php7, took me 2 hours to figure this out, grrr
$_o = $m->get($key, $cb, Memcached::GET_EXTENDED);
$o = $_o['value'];
$cas = $_o['cas'];
} else {
$o = $m->get($key, $cb, $cas);
miha at hribar dot info
15 years ago
This method also returns false in case you set the value to false, so in order to have a proper fault mechanism in place you need to check the result code to be certain that a key really does not exist in memcached.

= new Memcached();
$Memcached->addServer('localhost', 11211);
$Memcached->set('key', false);
var_dump($Memcached->get('key')); // boolean false
var_dump($Memcached->getResultCode()); // int 0 which is Memcached::RES_SUCCESS

Or just make sure the values are not false :)
13 years ago
Note that this function can return NULL as FALSE, so don't make checks with === FALSE as with the old Memcache class, because it won't work. :O

Use the not (!) operator and check the result code with getResultCode() as mentioned in the documentation :)
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