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 ($exception instanceof \Illuminate\Database\Eloquent\ModelNotFoundException) { //... }` and see if it will work ! — Maraboc, Jul 05 '17 at 17:43
try to add `use Illuminate\Database\Eloquent\ModelNotFoundException as ModelNotFoundException;` on top an then `if ($exception instanceof ModelNotFoundException) { //... }` — Maraboc, Jul 05 '17 at 18:35
Yes, it worked. Can you put this in the answer so that I can tick it as a solution? Thanks. — shin, Jul 06 '17 at 08:35

score 6 · Accepted Answer · answered Jul 06 '17 at 13:27

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);
}

score 2 · Answer 2 · edited Oct 14 '19 at 13:56

2

Sometimes an $exception is rethrown, so try to use

$exception->getPrevious() instanceof XXX

or

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

edited Oct 14 '19 at 13:56

Luís Cruz

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answered Mar 27 '19 at 20:02

ALeX inSide

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Laravel error handling, get_class vs instanceof

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