Memcached::decrement

(PECL memcached >= 0.1.0)

Memcached::decrement — Decrement numeric item's value

Opis

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

Memcached::decrement() decrements a numeric item's value by the specified offset. If the item's value is not numeric, it is treated as if the value were 0. If the operation would decrease the value below 0, the new value will be 0. Memcached::decrement() will fail if the item does not exist.

Parametry

key: The key of the item to decrement.
offset: The amount by which to decrement the item's value.

Zwracane wartości

Returns item's new value on success lub FALSE w przypadku niepowodzenia. The Memcached::getResultCode() will return Memcached::RES_NOTFOUND if the key does not exist.

Przykłady

Przykład #1 Memcached::decrement() example


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

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

$m->decrement('counter', 10);
var_dump($m->get('counter'));
?>

Powyższy przykład wyświetli:

int(4)
int(0)

Zobacz też:

Memcached::increment() - Increment numeric item's value

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