(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.
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки. The Memcached::getResultCode will return Memcached::RES_NOTFOUND if the key does not exist.
Пример #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'));
?>
Результат выполнения данного примера:
int(4) int(0)