What am I doing wrong that does not find the class through namespace in php?

Question

PHP

I declare a class with a namespace

namespace app\models;

class User extends Model {
      foo() { }
}

in another file I try to connect

<?php

use app\models\User;

class ControllerComments extends Controller {
      User::foo();
}

Class 'app\models\User' not found
what am I doing wrong?

Answer 1

Do you have autoload configured at least?
Also, your whole code is wrong.

namespace app\models;

class User extends Model {
      public static function foo() { echo "I've called by a controller!"; }
}

use \app\models\User;

class ControllerComments extends Controller {
      public function __construct() { User::foo(); }
}
$test = new ControllerComments();