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
$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
keythat is used to store the variable in the cache.keyis case sensitive. -
old_value -
Old value of the variable pointed by
keyin the user cache. The value should be of typelong, otherwise the function returnsfalse. -
new_value -
New value which will get assigned to variable pointer by
keyif a match is found. The value should be of typelong, otherwise the function returnsfalse.
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', 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
add a note
User Contributed Notes
备份地址：http://www.lvesu.com/blog/php/function.wincache-ucache-cas.php