(PECL wincache >= 1.1.0)
wincache_ucache_cas — Compares the variable with old value and assigns new value to it
$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.
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.
成功时返回 true， 或者在失败时返回 false。
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)