wincache_ucache_cas

(PECL wincache >= 1.1.0)

wincache_ucache_cas Compares the variable with old value and assigns new value to it

说明

wincache_ucache_cas(string $key, int $old_value, int $new_value): bool

Compares the variable associated with the key with old_value and if it matches then assigns the new_value to it.

参数

key

The key that is used to store the variable in the cache. key is case sensitive.

old_value

Old value of the variable pointed by key in the user cache. The value should be of type long, otherwise the function returns false.

new_value

New value which will get assigned to variable pointer by key if a match is found. The value should be of type long, otherwise the function returns false.

返回值

成功时返回 true, 或者在失败时返回 false

范例

示例 #1 Using wincache_ucache_cas()

<?php
wincache_ucache_set
('counter'2922);
var_dump(wincache_ucache_cas('counter'29221));
var_dump(wincache_ucache_get('counter'));
?>

以上例程会输出:

bool(true) 
int(1)

参见