Memcached::increment

(PECL memcached >= 0.1.0)

Memcached::increment — Increment numeric item's value

说明

public bool Memcached::increment ( string $key [, int $offset ] )

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.

参数

key: The key of the item to increment.
offset: The amount by which to increment the item's value; defaults to 1.

返回值

如果成功则返回 TRUE，失败则返回 FALSE。 The Memcached::getResultCode will return Memcached::RES_NOTFOUND if the key does not exist.

范例

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');
?>

上例将输出：

int(11)
string(1) "1"

参见

Memcached::decrement - Decrement numeric item's value