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 returnsFALSE
. -
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 returnsFALSE
.
返回值
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
范例
Example #1 Using wincache_ucache_cas()
<?php
wincache_ucache_set('counter', 2922);
var_dump(wincache_ucache_cas('counter', 2922, 1));
var_dump(wincache_ucache_get('counter'));
?>
以上例程会输出:
bool(true) int(1)
参见
- wincache_ucache_inc() - Increments the value associated with the key
- wincache_ucache_dec() - Decrements the value associated with the key