(PECL memcached >= 0.1.0)
Memcached::decrement — Decrement numeric item's value
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.
The key of the item to decrement.
The amount by which to decrement the item's value; defaults to 1.
Returns item's new value on success or FALSE on failure. The Memcached::getResultCode will return Memcached::RES_NOTFOUND if the key does not exist.
Example #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'));
?>
위 예제의 출력:
int(4) int(0)