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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()


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