session->setFlash('error', 'This is the message'); * Yii::$app->session->setFlash('success', 'This is the message'); * Yii::$app->session->setFlash('info', 'This is the message'); * ``` * Multiple messages could be set as follows: * ```php * Yii::$app->session->setFlash('error', ['Error 1', 'Error 2']); * ``` * @author Kartik Visweswaran * @author Alexander Makarov */ class Alert extends Widget { /** * @var array the alert types configuration for the flash messages. * This array is setup as $key => $value, where: * - $key is the name of the session flash variable * - $value is the bootstrap alert type (i.e. danger, success, info, warning) */ public $alertTypes = [ 'error' => 'alert-danger', 'danger' => 'alert-danger', 'success' => 'alert-success', 'info' => 'alert-info', 'warning' => 'alert-warning', ]; /** * @var array the options for rendering the close button tag. */ public $closeButton = []; public function init() { parent::init(); $session = Yii::$app->session; $flashes = $session->getAllFlashes(); $appendCss = isset( $this->options[ 'class' ] ) ? ' ' . $this->options[ 'class' ] : ''; foreach($flashes as $type => $data) { if(isset( $this->alertTypes[ $type ] )) { $data = (array) $data; foreach($data as $i => $message) { /* initialize css class for each alert box */ $this->options[ 'class' ] = $this->alertTypes[ $type ] . $appendCss; /* assign unique id to each alert box */ $this->options[ 'id' ] = $this->getId() . '-' . $type . '-' . $i; echo \yii\bootstrap\Alert::widget([ 'body' => $message, 'closeButton' => $this->closeButton, 'options' => $this->options, ]); } $session->removeFlash($type); } } } }