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Add docs for whenMissing() #8355

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Add docs for whenMissing() #8355

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14 changes: 14 additions & 0 deletions requests.md
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Expand Up @@ -414,6 +414,20 @@ To determine if a given key is absent from the request, you may use the `missing
//
}

The `whenMissing` method will execute the given closure if a value is absent from the request:

$request->whenMissing('name', function ($input) {
//
});

A second closure may be passed to the `whenMissing` method that will be executed if the specified value is absent from the request:

$request->whenMissing('name', function ($input) {
// The "name" value is absent...
}, function () {
// The "name" value is not absent...
});

<a name="merging-additional-input"></a>
### Merging Additional Input

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