致命错误：无法重新声明类php

Question

I have been asked to continue to program the remaining of our company's management system using PHP, though I'm just new to it. while inputting the url, I received this: Cannot redeclare class SessionHandler in C:\\xampp\\htdocs\\RMS\\classes\\session\\SessionHandler.php on line 4

It has three (3) classes: Session.php, SessionHandler.php,SessionController.php

Please do check the whole code below:

For SessionHandler.php

http://pastebin.com/ziA2advz

NOTE: I already did research the same issue I have, they said, use require_once. Since it's already coded, what else do you think is the reason for this problem? I'm very new to PHP, so please bear with me. Thanks

Answer 1

SessionHandler现在（自5.4起）是一个保留类名，你不能将这个名称用于你自己的类。