CodeIgniter Twig - Validation Errors - php

Question

I have a bit of problem with Twig in CodeIgniter.
I have tried to integrate Twig in CodeIgniter, so I would have clean templates.
CodeIgniter Simple and Secure Twig
This is really good, it is my first time to use templating engine.
But I encountered a problem. My form validation messages won't show if I submit the form.
public function user_register()
{
$this->form_validation->set_rules('username', 'Username', 'trim|required');
$this->form_validation->set_rules('password', 'Password', 'trim|required');
$this->form_validation->set_rules('email', 'Email', 'trim|required');
$this->form_validation->set_rules('firstname', 'Firstname', 'trim|required');
$this->form_validation->set_rules('lastname', 'Lastname', 'trim|required');
if ($this->form_validation->run() === FALSE) {
$data = [
'title' => 'Register',
];
$this->twig->display('user_register', $data);
}
}
If I do:
<?php echo validation_errors(); ?>
It won't output anything. My observation is, now that I have used Twig for my views, I cannot use php tags. Is it right to assume that?
If yes, how can I output validation errors in CodeIgniter using Twig?
I would appreciate any suggestions, and links that you will post. Hope you can guide me or lead me where to look at.
Thankyou.
Edit
I have tried using {{ validation_errors() }}
But it gives me an error: Please see screenshot:

Answer 1

You can do it using a very simple process like below code -
1. write this code in your controller
$data['errors'] = validation_errors();
$this->twig->display('user_register', $data);
2.
then inside your view, write {{ $errors }}
I have tested it & it's working without any problem.

Answer 2

I finally found the answer. In the package I included in my question, I just edited the file application/libraries/Twig.php:
private $functions_safe = [
'form_open',
'form_close',
'form_error',
'set_value',
'form_hidden',
'validation_errors', /** I just add this line and validation errors worked perfectly */
'form_input',
'form_password',
];
For anyone who will use the package above, hope this helps. Just add the function that you want to use in your view in the $functions_safe array.
Thanks!