You are viewing revision #10 of this wiki article.
This version may not be up to date with the latest version.
You may want to view the differences to the latest version or see the changes made in this revision.
From time to time people ask about registry...
If you coming to Yii with experience with Zend Framework for example, most likely you get used to
Registry in Yii ¶
In Yii you also has it
Yii::app()->params['abc'] = 123;
get all defined variables:
it is the same like use
Smart to use with CVarDumper:
CVarDumper::dump(Yii::app()->getParams(), 10, true);
If You use CVarDumper, it looks like this:
CAttributeCollection#1 ( [caseSensitive] => true [CMap:_d] => array ( 'abc' => 123 'a' => 123 'c' => 1316855672 'd' => 'cookie' ) [CMap:_r] => false [CComponent:_e] => null [CComponent:_m] => null )
You can also do mass assignment via array
Yii::app()->setParams(array('a' => 123, 'c' => time(), 'd' => 'cookie'));
To unset some key, you can use
Because the params is CMap instance
You can use the Cmap methods
get total of variables defined:
for the example above will return 4
It is the same like
Yii::app()->params->count; or Yii::app()->params->count();
You can get the keys
Will return array like this:
'0' => 'abc' '1' => 'a' '2' => 'c' '3' => 'd'
I mentioned the unset before, but you also can use
You can delete all params via
Tip 1 ¶
->params is the same like ->getParams() method params['sdf']=$val is the same like calling setParams('sdf',$val); This is right to all the framework, magic method take care all the "magic" behind it Just add for example in Controller that extends CController getSomething and you can use $this->something ...
Tip 2 ¶
For most of you this is trivial, but: The initial params don't come from nowhere In configs/main.php You have the params array
'params'=>array('abc' => 123),
I personally like to add in config folder
And than you can replace the above line with:
For php > 5.3
'params'=>require( __DIR__ .'/params.php'),
for < 5.3 you should't use
, replace it with
And the config/params.php contains:
return array( 'abc' =>123, );
Addition 1: Yii global state ¶
The params array, can be good registry for the current life cycle. but yii also has something called "globalstate", it allow you save the data "forever"
CApplication has 3 methods:
getGlobalState(string $key, mixed $defaultValue=NULL)
setGlobalState(string $key, mixed $value, mixed $defaultValue=NULL)
every thing you set via setGlobalState will be saved in runtime/global.bin in serialized form
Some common component that use it is CSecurityManager for validation key
And be careful with clearGlobalState, because it will regenerate the security key... it may have very bad effect if you for example encrypted passwords for user without specify your own key