wincache_ucache_cas()
(PECL wincache >= 1.1.0)
Compares the variable with old value and assigns new value to it
说明
wincache_ucache_cas(string $key,int $old_value,int $new_value): bool
Compares the variable associated with the$keywith$old_valueand if it matches then assigns the$new_valueto 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 returns
FALSE
.- $new_value
New value which will get assigned to variable pointer by$keyif a match is found. The value should be of typelong, otherwise the function returns
FALSE
.
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 keywincache_ucache_dec()
Decrements the value associated with the key