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PHP. Руководство по PHP. 2005

Memcache::decrement

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Memcache::decrement

(no version information, might be only in CVS)Memcache::decrement -- Decrement item's value

Description

int Memcache::decrement (string key [, int value])

Memcache::decrement() decrements value of the

item by value. Similarly to

Memcache::increment(), current value of the item is

being converted to numerical and after that value

is substracted.

Parameter value is optional. It's default is 1.

Замечание:

New item's value will not be less than zero.

Замечание:

Do not use Memcache::decrement() with item, which was

stored compressed, because consequent call to

Memcache::get() will fail.

Also you can use memcache_decrement() function.

See example below.

Пример 1. Memcache::decrement() example


<?php

/* procedural API */
$memcache_obj = memcache_connect('memcache_host', 11211);
/* decrement item by 2 */
$new_value = memcache_decrement($memcache_obj, 'test_item', 2);

/* OO API */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
/* decrement item by 3 */
$new_value = $memcache_obj->decrement('test_item', 3);
?>

Memcache::decrement() does not

create an item if it didn't exist.

Memcache::decrement() returns item's new value on

success or FALSE on failure.

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