public function createControllerByID($id)
{
$pos = strrpos($id, '/');
if ($pos === false) {
$prefix = '';
$className = $id;
} else {
$prefix = substr($id, 0, $pos + 1);
$className = substr($id, $pos + 1);
}
if (!preg_match('%^[a-z][a-z0-9\\-_]*$%', $className)) {
return null;
}
if ($prefix !== '' && !preg_match('%^[a-z0-9_/]+$%i', $prefix)) {
return null;
}
$className = str_replace(' ', '', ucwords(str_replace('-', ' ', $className))) . 'Controller';
$className = ltrim($this->controllerNamespace . '\\' . str_replace('/', '\\', $prefix) . $className, '\\');
if (strpos($className, '-') !== false || !class_exists($className)) {
return null;
}
if (is_subclass_of($className, 'yii\\base\\Controller')) {
$controller = Yii::createObject($className, [$id, $this]);
return get_class($controller) === $className ? $controller : null;
} elseif (YII_DEBUG) {
throw new InvalidConfigException("Controller class must extend from \\yii\\base\\Controller.");
} else {
return null;
}
}