PHP 5.6.0beta1 released

Memcached::get

(PECL memcached >= 0.1.0)

Memcached::getRetrieve an item

Descrição

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.

Parâmetros

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.

Valor Retornado

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

Exemplos

Exemplo #1 Memcached::get() example #1

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

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

O exemplo acima irá imprimir:

int(100)

Exemplo #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 */
        /* ...       */
    
}
}
?>

Veja Também

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User Contributed Notes 2 notes

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2
miha at hribar dot info
4 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.

<?php
$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 :)
up
0
denis_truffaut[A-T]hotmail[D-O-T]com
3 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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