PHP-Handbuch: Decrement item's value

Beschreibung

int Memcache::decrement ( string $key [, int $value = 1 ] )

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 subtracted.

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

Hinweis:
Do not use Memcache::decrement with item, which was stored compressed, because consequent call to Memcache::get will fail.

Memcache::decrement does not create an item if it didn't exist. Also you can use memcache_decrement function.

Parameter-Liste

key: Key of the item do decrement.
value: Decrement the item by value.

Rückgabewerte

Returns item's new value on successIm Fehlerfall wird FALSE zurückgegeben..

Beispiele

Beispiel #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);
?>

Siehe auch

Memcache::increment
Memcache::replace