php - can't use imap_open with symfony 5 - Attempted to call function "imap_open" from namespace "AppController"

one text

I would like read email on a project.

but i have an error when i use "imap_open"

have you an idea ?

    /**
 * @Route("/", name="app_home")
 */
public function index(): Response
{


    $imap   = imap_open('{imap.ionos.fr:993/imap/ssl}INBOX', 'j***test@2jcrea.fr', '**password***');
    $some   = imap_search($imap, 'SUBJECT "HOWTO be Awesome" SINCE "8 August 2008"');

    $msgnos = imap_search($imap, 'ALL');
    imap_close($imap);

    return $this->render('home/index.html.twig', [
        'controller_name' => 'HomeController',
    ]);
}

i have this error :

Attempted to call function "imap_open" from namespace "App\Controller".

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