laravel5 template variables cannot be parsed

Question

I just installed laravel 5.3, set a template variable, and displayed it in the template, but it doesn't work. The code is as follows:

Route::get('/', function () {
    return view('index',['msg'=>'hello world']);
});

{{ $msg }}

Question
Where is the problem? I followed the documentation, but it just doesn’t work. But using native PHP code in the template works: <?php echo $msg; ?>

过去多啦不再A梦 · Answer

It seems like your template file is not parsed using the Blade engine.
Are you sure your template file has .blade.php as the extension?