Help me: Mysql connection dont work

[Valerius]

I have a problem with the connection to mysql. The following code I tried

route.comments.php

<?php

$route = function($handler) {
try {
   
            // test id
            $m_id = '2';
           
           
           
            $db = DB::getInstance();
            $db->query('SELECT * FROM '.DB::getTable('comments').' WHERE id_post=:m_id');
            $db->bind(':m_id', $m_id);
            $db_c = $db->fetchAll();
           
            foreach($db_c as $db_a) {
                echo $db_a['comment'];
            }

        } catch(Exception $e) {
        G\exception_to_error($e);
    }
   
};

?>

With this code comes only blank page. What am I doing wrong?

 

[Valerius]

Property error solved