check form each input laravel
<!-- form.blade.php -->
<div class="form-group col-md-6 mb-3">
<label for="contact_lastname">Nom <span class="text-danger">*</span></label>
<input type="text"
class="form-control @if($errors->has('contact_lastname')) is-invalid @endif"
id="contact_lastname" name="contact_lastname"
aria-describedby="validation_contact_lastname">
@if($errors->has('contact_lastname'))
<div id="validation_contact_lastname" class="invalid-feedback">
{{$errors->first('contact_lastname') }}
</div>
@endif
</div>
<!-- ContactsController.php -->
$request->validate([
'contact_lastname' => 'required'
]);