laravel validation if field has value code example

Example 1: email validation in laravel

'email' => 'required|email|unique:users,email',
//@sujay

Example 2: if any error in blade laravel

@if ($errors->any())
     @foreach ($errors->all() as $error)
         <div>{{$error}}</div>
     @endforeach
 @endif

Example 3: laravel form validation based on another field value

$validator = Validator::make($request->all(),[
        'program'           => 'required',
        'music_instrument'  => 'required_if:program.*,in:Music'
  ]);