Php/docs/function.wincache-ucache-cas

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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

Example #1 Using wincache_ucache_cas()

<?phpwincache_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