<div class ="form-group">
{!! Html::decode(Form::label('first_name','<strong>First Name:</strong>')) !!}
{{Form::text('first_name', old('first_name'), ['class' => 'form-control '.($errors->has('first_name') ? 'is-invalid': ''), 'placeholder' => '', 'required'])}}
</div>
Что означает этот бит кода?
($errors->has('first_name') ? 'is-invalid': '')