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All snippets tagged with "yii" tag



samdark
  • Reputation: 349
  • Snippets: 57
  • Revisions: 5

In order to delete item from fragment cache in Yii 2.0 you need to form a key in a special way.

function deleteFragmentCacheByKey($key)
{
    return Yii::$app->cache->delete(['yii\widgets\FragmentCache', $key]);
}
samdark
  • Reputation: 349
  • Snippets: 57
  • Revisions: 5

While it's kinda pointless, it's possible to use callbacks as URL handlers totally avoiding MVC in the same style as many micro-frameworks do.

require 'vendor/autoload.php';
require 'vendor/yiisoft/yii2/Yii.php';


$app = new CallbackWebApplication([
    'id' => 'MyApplication',
    'basePath' => __DIR__,
    'components' => [
        'urlManager' => [
            'enablePrettyUrl' => true,
            'showScriptName' => false,
        ],
    ],
]);

$app->onGet('hello/<name>', function($name) {
    return 'Hello, ' . $name . '!';
});
$app->run();
<?php
class CallbackWebApplication extends \yii\web\Application
{
    private $callbacks = [];

    /**
     * @inheritdoc
     */
    public function handleRequest($request)
    {
        list ($route, $params) = $request->resolve();
        if (preg_match('~callbacks/(\d+)~', $route, $matches) && isset($this->callbacks[$matches[1]])) {
            $result = call_user_func_array($this->callbacks[$matches[1]], $params);
        } else {
            throw new \yii\web\NotFoundHttpException();
        }

        $response = $this->getResponse();
        $response->data = $result;
        return $response;
    }

    public function onGet($pattern, callable $callback)
    {
        // it's possible to implement our own UrlRule class to handle it
        // but I was too lazy
        $callbackIndex = count($this->callbacks);
        $this->callbacks[$callbackIndex] = $callback;
        Yii::$app->getUrlManager()->addRules([
            $pattern => 'callbacks/' . $callbackIndex
        ]);
    }
}