在Symfony3 / PHP中通过字符串变量创建新的Object

Question

I send variables to my route via an ajax post. Based on the value of my type value I create a new Object, like this:

if($request->get('type') === 'HardwareType'){
    $e = new HardwareType();
}else if($request->get('type') === 'SetupType'){
    $e => new SetupType();
}else{
    new NotFoundHttpException();
}

This gets out of hand quickly even with a switch I think its still "ugly". Is there any way I could do sth. like this:

$e = new $request->get('type')();

Any hint appreciated

EDIT I use the class(es) with this use AppBundle\Entity\HardwareType; etc.

Answer 1

you can do this:

$e = $request->get('type');
$class = new $e();

If you need you can add the path or the class like this:

$e = 'AppBundle\Entity\' . $request->get('type');

Obviously you need to add use at the begin of the file and you can check before the new if the class exist or not

Like this:

if (!class_exists($e)) {
   //exception
}