messages on errors laravel code example

Example 1: how to show validation error in laravel blade

@if($errors->any())
    <div class="alert alert-danger">
        <p><strong>Opps Something went wrong</strong></p>
        <ul>
        @foreach ($errors->all() as $error)
            <li>{{ $error }}</li>
        @endforeach
        </ul>
    </div>
@endif

@if(session('success'))
    <div class="alert alert-success">{{session('success')}}</div>
@endif

@if(session('error'))
    <div class="alert alert-danger">{{session('error')}}</div>
@endif

Example 2: how to add an custom error to validater error in laravel

if (request('event') == null) {
    $validator->errors()->add('event', 'Please select an event');
}