gistfile1.php

<?php
namespace Sise\DesignBundle\Controller;


use Symfony\Component\HttpFoundation\Response,
Symfony\Bundle\FrameworkBundle\Controller\Controller,
 eZ\Publish\Core\MVC\Symfony\Controller\Content\ViewController as APIViewController;



class UsersController extends APIViewController {

 function makeGhostAccount($email, $lastName, $firstName) {

	// This does not work
        if ($this->hasNewEmailAddress($email)) {
           

        } 

        return new Response();

	}

	function hasNewEmailAddress($email) {

        $user = $this->getLegacyKernel()->runCallback(
            function () use ( $email ) {
                return eZUser::fetchByEmail( $email );
            }
        );
        if ( $user instanceof eZUser ) {
            return false;
        } else {
            return true;
        }
	}

}


?>