How to use Laravel form model binding with array as name attribute?

You could do something like this assuming that you would have a single $user and multiple $types

Form::macro('userTypes', function($user,$types)
{
    foreach ($types as $type) {
        $concat = $user . "_" . $type;
        return '<input type="{$type}" name="{$concat}">';
    }
});

And customize the output with your form style, even adding more complexity to the function might be required.

And then simply calling it for example

$user = "johndoe";
$types = array("email","text");
Form::userTypes($user,$types);

That would result in

<input type="email" name="johndoe_email">
<input type="text" name="johndoe_phone">

If you want to do it in a single line and assuming that you would have a single $user and a single$type you could do something like

Form::macro('userType', function($user,$type)
{
        return '<input type="{$type}" name="{$user[$type]}">';
});

And with the call

$user = [ "mail" => "some_mail_value" ];
Form::userType($user,"mail");

Would result in

<input type="mail" name="some_mail_value">

Or perhaps you'd like something that would work with a single $user key-value array as :

Form::macro('userType', function($user)
{       
        $keys = array_keys($user);
        foreach ($keys as $key => $value) {
            return '<input type="{$key}" name="{$value}">';
        }
});

And with the call

$user = ["mail" =>  "mail_value" , "text" => "text_value"];
Form::userType($user);

That would result in

<input type="mail" name="mail_value">
<input type="text" name="text_value">

And finally I didn't find a direct way to do it with default form model binding, as It requires the field name to be the same as the model attribute, but you could do a workaround as

Form::macro('customBind', function($user_model,$type)
{       
    return '<input type={$type} name="user[{$type}]" value="{$user_model->$type}">';
});

And then

$user = new User();
$user->email = "[email protected]";

Form::customBind($user,"email");

Which would produce something like

<input type="email" name="user[email]" value="[email protected]">

The takeaway point is that basically the solution to your problem is creating a Macro, I have provided some workarounds on this but you will need to refine this to your specific needs.