$request not found in laravelLearning Curve- Perfect Tutorial for the beginers | Learning Curve- Perfect Tutorial for the beginers

ErrorException in TestController.php line 31: Undefined variable: request In Lumen

<?php
public function displayOutput(){

$uid = $request->input('id');
?>

<?php

public function displayOutput(){

$uid = $request->input('id');

In my TestController.php while accessing a model function it is throwing the error Solution:

<?php
use Illuminate\Http\Request;
public function displayOutput(Request $request){

$uid = $request->input('id');
?>

<?php

use Illuminate\Http\Request;

public function displayOutput(Request $request){

$uid = $request->input('id');