add() public method
Stores a value identified by a key into cache if the cache does not contain this key.
Nothing will be done if the cache already contains the key.
| public boolean add ( $key, $value, $duration = 0, $dependency = null ) | ||
|---|---|---|
| $key | mixed |
A key identifying the value to be cached. This can be a simple string or a complex data structure consisting of factors representing the key. |
| $value | mixed |
The value to be cached |
| $duration | integer |
The number of seconds in which the cached value will expire. 0 means never expire. |
| $dependency | yii\caching\Dependency |
Dependency of the cached item. If the dependency changes, the corresponding value in the cache will be invalidated when it is fetched via get(). This parameter is ignored if $serializer is false. |
| return | boolean |
Whether the value is successfully stored into cache |
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