Yac::add

Store into cache

&reftitle.description; public `bool` `Yac::add` `string` `keys` `mixed` `value` `int` `ttl` 0 public `bool` `Yac::add` `array` `key_vals`

Added a item into cache.

&reftitle.parameters;

`keys`

- &string; key

`value`

- mixed value, All php value type could be stored except &resource;

`ttl`

- expire time

&reftitle.returnvalues;

&boolean;, &true; on success, &false; on failure

`Yac::add` may fail if cas lock could not obtain, so, if you need the value to be stored properly, you may write codes like:

#### Make sure the item is stored

           while(!$yac->set("key", "vale));