(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.
key
The key of the item to decrement.
offset
The 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)