CODEWITHSUNDEEP
phplaravel
user8555937
user8555937

Reputation: 2387

Laravel: Event Listener - Argument 1 passed to {closure}() must be of the type array, object given

I hope this question is not duplicated.

I have the following event defined:

Event::listen('test', function(array $data){
    dd($data);
});

When I attempt to fire it, I receive the below exception:

event('test', [
    'foo' => 'bar',
    'asdf' => 'ghjk',
]);

TypeError:

Argument 1 passed to {closure}() must be of the type array, object given

However if I execute it the following way, problem does not occur:

event('test', [[
    'foo' => 'bar',
    'asdf' => 'ghjk',
]]);

Question: if I want to pass a strict array to the listener closure, is there a way to avoid the wrapping of my var in another array?

Upvotes: 1

Views: 1663

Answers (1)

Kurt Friars
Kurt Friars

Reputation: 3764

After digging into the framework a bit I think I have found the "problem".

The array you are passing into your listener is supposed to be the arguments of the callback. ie)

Event::listen('test', function($foo, $bar, $baz) {
    dd($foo, $bar, $baz);
});

event('test', ['foo', 'bar', 'baz']);

When you pass an array to the event() helper it will ultimately call makeListener in Illuminate\Events\Dispatcher to execute your closure. And in that method it calls your listener as follows:

    return $listener(...array_values($payload));

So the reason why:

event('test', [[
    'foo' => 'bar',
    'asdf' => 'ghjk',
]]);

Works, is because:

...array_values([[
    'foo' => 'bar',
    'asdf' => 'ghjk',
]])

is simply ['foo' => 'bar', 'asdf' => 'ghjk']

Hope that helps! One of those things that is just about finding the right documentation!

So to answer your ultimate question:

"Question: if I want to pass a strict array to the listener closure, is there a way to avoid the wrapping of my var in another array?"

No :(

Upvotes: 2

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