public function createAction(Request $request){
    $em = $this->getDoctrine()->getManager();
    $post_send = $request->request->get('userbundle_user');
    if (array_key_exists('id', $post_send)) {
        $ldap_success = true;
        $entity = $em->getRepository('UserBundle:User')->find($post_send['id']);
    }else{
        $ldapconn = ldap_connect("10.0.0.230")
            or die("Could not connect to LDAP server.");

        $ldap_success = false;
        if ($ldapconn) {
            try{
                $ldapbind = ldap_bind($ldapconn, $post_send['username'], $post_send['password']);

                //Now I have to check if the user exist first on the Active Directory
                //$ldaptree    = "OU=SBSUsers,OU=Users,OU=MyBusiness,DC=myDomain,DC=local" I'm not really sure what should I put here;
                //$ldapsearch = ldap_search($ldapconn,$ldaptree, $post_send['username']) or die ("Error in search query: ".ldap_error($ldapconn));+

                if ($ldapbind) {
                    $ldap_success = true;
                } else {
                    $ldap_success = false;
                }
            }
            catch(Exception $e){
                $ldap_success = false;
            }
        }
        $entity = new User();
    }

    if( $ldap_success && $ldapsearch){ //Here I expect both true, the success conecction and the search, only with both true I will create a user.
        $entity->setUsername($post_send['username']);
        $entity->setRut($post_send['rut']);
        if (array_key_exists('password', $post_send)) {
            if ( $post_send['password'] != "" ) {
                $entity->setPassword($post_send['password']);
                $this->setSecurePassword($entity);
            }
        }
        $entity->setEmail($post_send['email']);
        $entity->setDateAdded(new DateTime());
        $entity->setIsActive(true);
        $entity->setIsAdmin(true);
        $entity->setUserRoles($em->getRepository('UserBundle:Role')->find( $post_send['admin_roles_id'] ));
        $entity->setWizardCompleted(true);
        $em->persist($entity);
        $em->flush();
        $json = new JsonUtils();
        return $json->arrayToJson(array("id"=>$entity->getId()));
    }
    return $json->arrayToJson( array("sueccess"=>false ) );
}

$ldapconn = ldap_connect("10.0.0.230");
ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0)
// Use a LDAP service account with only read access...
$searchUser = 'user@myDomain.com';
$searchPass = '12345';

$ldap_success = false;
if (@ldap_bind($ldapconn, $searchUser, $searchPass)) {
    $attributes = ['cn'];
    $filter = "(&(objectClass=user)(objectCategory=person)(userPrincipalName=".ldap_escape($post_send['username'], null, LDAP_ESCAPE_FILTER)."))";
    $baseDn = "DC=myDomain,DC=com";
    $results = @ldap_search($ldapconn, $baseDn, $filter, $attributes);
    $info = @ldap_get_entries($ldapconn, $results);

    $ldap_success = ($info && $info['count'] === 1);
}