Assume we want to create a behavior that will uppercase the “name” property of the component the behavior is attached to.
Step 1 − Inside the components folder, create a file called UppercaseBehavior.php with the following code.
<?php
namespace app\components;
use yii\base\Behavior;
use yii\db\ActiveRecord;
class UppercaseBehavior extends Behavior {
public function events() {
return [
ActiveRecord::EVENT_BEFORE_VALIDATE => 'beforeValidate',
];
}
public function beforeValidate($event) {
$this->owner->name = strtoupper($this->owner->name);
}
}
?>
In the above code we create the UppercaseBehavior, which uppercase the name property when the “beforeValidate” event is triggered.
Step 2 − To attach this behavior to the MyUser model, modify it this way.
<?php
namespace app\models;
use app\components\UppercaseBehavior;
use Yii;
/**
* This is the model class for table "user".
*
* @property integer $id
* @property string $name
* @property string $email
*/
class MyUser extends \yii\db\ActiveRecord {
public function behaviors() {
return [
// anonymous behavior, behavior class name only
UppercaseBehavior::className(),
];
}
/**
* @inheritdoc
*/
public static function tableName() {
return 'user';
}
/**
* @inheritdoc
*/
public function rules() {
return [
[['name', 'email'], 'string', 'max' => 255]
];
}
/**
* @inheritdoc
*/
public function attributeLabels() {
return [
'id' => 'ID',
'name' => 'Name',
'email' => 'Email',
];
}
}
?>
Now, whenever we create or update a user, its name property will be in uppercase.
Step 3 − Add an actionTestBehavior function to the SiteController.
public function actionTestBehavior() {
//creating a new user
$model = new MyUser();
$model->name = "DINESH";
$model->email = "dinesh@gmail.com";
if($model->save()){
var_dump(MyUser::find()->asArray()->all());
}
}
Step 4 − Type http://localhost:8080/index.php?r=site/test-behavior in the address bar you will see that the name property of your newly created MyUser model is in uppercase.
