Retrieve an item


(PECL memcached >= 0.1.0)

Memcached::getRetrieve an item

Описание

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.

Список параметров

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.

Возвращаемые значения

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

Примеры

Пример #1 Memcached::get() example #1

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

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

Результат выполнения данного примера:

 int(100) 

Пример #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 */
        /* ...       */
    
}
}
?>

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