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 \yii\bootstrap4\Widget { /** * @var array the alert types configuration for the flash messages. * This array is setup as $key => $value, where: * - key: the name of the session flash variable * - value: 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. * Array will be passed to [[\yii\bootstrap\Alert::closeButton]]. */ public $closeButton = []; /** * {@inheritdoc} */ public function run() { $session = Yii::$app->session; $flashes = $session->getAllFlashes(); $appendClass = isset($this->options['class']) ? ' ' . $this->options['class'] : ''; foreach ($flashes as $type => $flash) { if (!isset($this->alertTypes[$type])) { continue; } $data = (array) $flash; foreach ($data as $i => $message) { /* initialize css class for each alert box */ $this->options['class'] = $this->alertTypes[$type] . $appendClass; /* assign unique id to each alert box */ $this->options['id'] = $this->getId() . '-' . $type . '-' . $i; $message = StringHelper::replace("'", '"', $message); $message = StringHelper::replace("\r", '', $message); $message = StringHelper::replace("\n", '', $message); // 调用函数 $this->view->registerJs(<<removeFlash($type); } } }