How to return custom error message from controller method validation

to get custom error message you need to pass custom error message on third parameter,like that

$this->validate(    $request,     ['thing' => 'required'],    ['thing.required' => 'this is my custom error message for required']);

For Multiple Field, Role and Field-Role Specific Message

$this->validate(        $request,         [               'uEmail'             => 'required|unique:members',            'uPassword'          => 'required|min:8'        ],        [               'uEmail.required'    => 'Please Provide Your Email Address For Better Communication, Thank You.',            'uEmail.unique'      => 'Sorry, This Email Address Is Already Used By Another User. Please Try With Different One, Thank You.',            'uPassword.required' => 'Password Is Required For Your Information Safety, Thank You.',            'uPassword.min'      => 'Password Length Should Be More Than 8 Character Or Digit Or Mix, Thank You.',        ]    );

https://laravel.com/docs/5.3/validation#working-with-error-messages

$messages = [    'required' => 'The :attribute field is required.',];$validator = Validator::make($input, $rules, $messages);

"In most cases, you will probably specify your custom messages in a language file instead of passing them directly to the Validator. To do so, add your messages to custom array in the resources/lang/xx/validation.php language file."