Display username after login in cakephp3 - cakephp

Question

I want to display username after login in cakephp3. I write follow code but part of show username doesn't work. user after login redirect to main page.
Hi <?php print $this->request->session()->read('User',$user); ?>
login in UserController:
public function login() {
if ($this->request->session()->read('login_ok') == '1') {
$this->redirect(['controller' => 'users', 'action' => 'main']);
}
if ($this->request->is('post')) {
//$hasher = new DefaultPasswordHasher();
$count = $this->Users->find()
->where(['username' => $this->request->data['username'],
// 'password' => $this->request->data['password']])
'password' => md5($this->request->data['password'])])
->count();
if ($count > 0) {
$result = true;
$this->request->session()->write('User', $user); //store username
$this->request->session()->write('login_ok', '1');
$this->redirect(['controller' => 'users', 'action' => 'main']);
} else {
$result = false;
}
$this->set('result', $result);
}
}
public function main() {
if ($this->request->session()->read('login_ok') != '1') {
$this->redirect(['controller' => 'users', 'action' => 'login']);
}
$query = $this->request->session()->write('User',$user);
$this->set('user', $query);
}
and this main.ctp codes:
Hi <?php print $this->request->session()->read('User', $user); ?>
Can you help in making this Code OR Suggest a new code ?

Answer 1

You should really be using the cakephp AuthComponent and the functions that's made for this for example identifiying the user trying to login with identify().
There is really no point using a framework if you're not going to use the functions provided by the framework as N Nem pointed out in the comments.
In the snippet you posted, you seem to never set the $user variable when you write to the session. You need to set it to be able to read it.
The following code is how you're supposed to do it in Cakephp 3 i really suggest you use that approach.
AppController.php
public function initialize()
{
$this->loadComponent('Auth', [
'loginAction' => [
'controller' => 'Users',
'action' => 'login'
],
'loginRedirect' => [
'controller' => 'Start',
'action' => 'index'
],
'logoutRedirect' => [
'controller' => 'Users',
'action' => 'login'
],
'authenticate' => [
'Form'
],
]);
}
UsersController.php
public function login()
{
if ($this->request->is('post')) {
$user = $this->Auth->identify();
if ($user) {
$this->Auth->setUser($user);
return $this->redirect($this->Auth->redirectUrl());
} else {
$this->Flash->error(__('Username or password is incorrect'), [
'key' => 'auth'
]);
}
}
}
Model/Entity/User.php
protected function _setPassword($password)
{
return (new DefaultPasswordHasher)->hash($password);
}