Refactor code structure for improved readability and maintainability

autoload/factory/class.Apanel.php

@@ -1,4 +1,4 @@
-<?
+<?php
 namespace factory;
 class Apanel {
   static public function check_delivery( $basket )

autoload/factory/class.Tickets.php

@@ -1,4 +1,4 @@
-<?
+<?php
 namespace factory;
 class Tickets {
 

autoload/factory/class.Users.php

@@ -50,7 +50,7 @@ class Users
   {
     global $mdb;
 
-    $result = $mdb -> get( 'users', '*', [ 'email' => strtolower( $email ) ] );
+    $result = $mdb -> get( 'users', '*', [ 'email' => strtolower( (string) $email ) ] );
     if ( $result === false )
       return false;
     else