kom.php

<?php

// doctor_registration.php

Session::init();

$this->view->data['username'] = Session::get('username') ? Session::get('username') : '';
$this->view->data['first_name'] = Session::get('first_name') ? Session::get('first_name') : '';
$this->view->data['last_name'] = Session::get('last_name') ? Session::get('last_name') : '';
$this->view->data['email'] = Session::get('email') ? Session::get('email') : '';

// registration.php
<input type="email" name="email" id="email" value="<?=isset($username) ? $username : ''; ?>" class="form-control" />
  
  <option <?=(isset($selected_specialty) && $selected_specialty === $value['specialty']) ? 'selected' : ''; ?></option>