Memcached::__construct
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Memcached
PHP Manual

# Memcached::decrement

(PECL memcached >= 0.1.0)

Memcached::decrement — Decrement numeric item's value

### 설명

public int Memcached::decrement ( string `$key` [, int `$offset` ] )

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.

### 인수

`key`

  The key of the item to decrement.

`offset`

  The amount by which to decrement the item's value; defaults to 1.

### 반환값

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.

### 예제

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'));
?>`

위 예제의 출력:

    int(4)
    int(0)

### 참고

- Memcached::increment - Increment numeric item's value

Memcached::__construct
Memcached::delete
Memcached
PHP Manual