(PECL memcached >= 0.1.0)
Memcached::decrement — Decrement numeric item's value
$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.
keyThe key of the item to decrement.
offsetThe amount by which to decrement the item's value.
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'));
?> The above example will output:
int(4) int(0)