CODE EXAMPLE FOR PHP

Laravel Rules

public function store(Request $request) {
    $this->validate($request, [
        'name' => 'required|string',
        'body' => 'required|string',
        'publish_at' => 'required|date_format:Y-m-d H:i:s'
    ], [
      'name.required' => 'A article name is required',
      'body.required'  => 'A article body is required',
      'publish_at.date_format' => 'The publish at date is not in the correct format.'
    ]);
 
    // The request validated and this code will get run
    ...
}