Laravel error handling, get_class vs instanceof

Question

In the following code in app/Exceptions/Handler.php, the first one doesn't work but the second one does.

dd(get_class($exception)); outputs "Illuminate\Database\Eloquent\ModelNotFoundException".

The first one is similar to the doc. How can I make it work using instanceof?

    public function render($request, Exception $exception)
    {
        //dd(get_class($exception));
        // this does not work.
        if ($exception instanceof Illuminate\Database\Eloquent\ModelNotFoundException
) {
            return response()->json(['error'=>['message'=>'Resouce not found']], 404);
        }
        // This one works.
        if(get_class($exception) == "Illuminate\Database\Eloquent\ModelNotFoundException") {
            return response()->json(['error'=>['message'=>'Resouce not found']], 404);
        }

        return parent::render($request, $exception);
    }

Try to add \ like this : if ($exception instanceof \Illuminate\Database\Eloquent\ModelNotFoundException) { //... } and see if it will work ! — Maraboc
– Maraboc, Commented Jul 5, 2017 at 17:43
try to add use Illuminate\Database\Eloquent\ModelNotFoundException as ModelNotFoundException; on top an then if ($exception instanceof ModelNotFoundException) { //... } — Maraboc
– Maraboc, Commented Jul 5, 2017 at 18:35
Yes, it worked. Can you put this in the answer so that I can tick it as a solution? Thanks. — shin
– shin, Commented Jul 6, 2017 at 8:35

Maraboc · Accepted Answer · 2017-07-06 13:27:03Z

6

To use instanceof you must use the full class name, and if your class has a namespace then you should use the fully qualified class name of the class.

And there is an other way to use instanceof using a short name (alias) for a given class thanks to use statement, in your case you can use it like so :

use Illuminate\Database\Eloquent\ModelNotFoundException as ModelNotFoundException; // on top of course :) 

if ($exception instanceof ModelNotFoundException) {
        return response()->json(['error'=>['message'=>'Resouce not found']], 404);
}

answered Jul 6, 2017 at 13:27

Maraboc

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Comments

Luís Cruz · Accepted Answer · 2019-10-14 13:56:14Z

2

Sometimes an $exception is rethrown, so try to use

$exception->getPrevious() instanceof XXX

or

get_class($exception->getPrevious()) == 'XXX'

edited Oct 14, 2019 at 13:56

Luís Cruz

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answered Mar 27, 2019 at 20:02

ALeX inSide

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