Memcache::decrement

(PECL memcache:0.2-2.1.2)

Memcache::decrement — Decrement item's value

说明

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.

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

Note: 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.

参数

key: Key of the item do decrement.
value: Decrement the item by value . Optional and defaults to 1.

返回值

Returns item's new value on success or FALSE on failure.

范例

Example#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);
?>

参见

Memcache::increment()
Memcache::replace()


	PHP5中文手册 memcache_debug Memcache::delete Memcache PHP Manual Memcache::decrement (PECL memcache:0.2-2.1.2) Memcache::decrement — Decrement item's value 说明 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. Note: New item's value will not be less than zero. Note: 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. 参数 `key` Key of the item do decrement. `value` Decrement the item by `value` . Optional and defaults to 1. 返回值 Returns item's new value on success or `FALSE` on failure. 范例 Example#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); ?>` 参见 Memcache::increment()* Memcache::replace() memcache_debug Memcache::delete Memcache PHP Manual