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Memcached::decrement

(PECL memcached >= 0.1.0)

Memcached::decrementDecrement numeric item's value

Descrizione

public int Memcached::decrement ( string $key [, int $offset = 1 [, int $initial_value = 0 [, int $expiry = 0 ]]] )

Memcached::decrement() decrements a numeric item's value by the specified offset. If the item's value is not numeric, an error will result. If the operation would decrease the value below 0, the new value will be 0. Memcached::decrement() will set the item to the initial_value parameter if the key doesn't exist.

Elenco dei parametri

key

The key of the item to decrement.

offset

The amount by which to decrement the item's value.

initial_value

The value to set the item to if it doesn't currently exist.

expiry

The expiry time to set on the item.

Valori restituiti

Returns item's new value on success o FALSE in caso di fallimento.

Esempi

Example #1 Memcached::decrement() example

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

$m->set('counter'5);
$n $m->decrement('counter');
var_dump($n);

$n $m->decrement('counter'10);
var_dump($n);

var_dump($m->get('counter'));

$m->set('counter''abc');
$n $m->increment('counter');
// ^ will fail due to item value not being numeric
var_dump($n);
?>

Il precedente esempio visualizzerĂ :

int(4)
int(0)
int(0)
bool(false)

Vedere anche:

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User Contributed Notes 3 notes

up
10
Pramod Patil
23 days ago
decrement will not change TTL of the stored key/value.
up
5
Pramod Patil
19 days ago
Found possible bug :
decrement fails and returns -1  when memcached::OPT_BINARY_PROTOCOL is set to true.

tested on PECL Memcached 2.1.0 and libmemcached version 1.0.8
up
1
jbaginski
1 year ago
PECL memcached < 0.2.0

public int Memcached::decrement ( string $key [, int $offset = 1 ] )
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