(PECL memcached >= 0.1.0)
Memcached::get — Retrieve an item
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.
keyThe key of the item to retrieve.
cache_cb Read-through caching callback or null.
get_flags Flags to control the returned result. When Memcached::GET_EXTENDED is given, the function will also return the CAS token.
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.
| Version | Beschreibung |
|---|---|
| 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. |
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 {
}
}
?>