(PECL memcached >= 0.1.0)
Memcached::increment — Increment numeric item's value
Memcached::increment() increments 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. Memcached::increment() will fail if the item does not exist.
The key of the item to increment.
The amount by which to increment the item's value.
Returns new item's value on success 或者在失败时返回 FALSE. The Memcached::getResultCode() will return Memcached::RES_NOTFOUND if the key does not exist.
Example #1 Memcached::increment() example
<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$m->set('counter', 0);
$m->increment('counter');
$m->increment('counter', 10);
var_dump($m->get('counter'));
$m->set('key', 'abc');
$m->increment('counter');
?>
以上例程会输出：
int(11) string(1) "1"