PHP全局设置URL并在每个页面中调用它

I want all my hardcoded URL's will be saved in only 1 php file. Let's name it. Global.php so whenever I have hardcoded variable URLs. I will save it on my Global.php.

For example.

define("MAIN", "http://mainpage.com");
define("LOGIN", "http://mainpage.com/login");
define("REGISTER", "http://mainpage.com/register"):

So for example. I have a Login Page..

I will try to used the Global defined URL so It can avoid hardcoded URLS..

Login.php

include'../Global.php';
                 <ul>
                    <li><a href="<?php echo REGISTER; ?>">REGISTER</a></li>     
                    <li><a href="<?php echo LOGIN; ?>">LOG IN</a></li>
                </ul>

Like above, but the problem is on my Global.php. The domain name "http://mainpage.com" is repeatedly used in Global.. What I want to achieve is to set the domain name in Global.php and the subdomain and directory file of every pages should be concatenate to the Global define Domain only.. How I can do this?

I have research another solution like this:

define("LOGIN", "/login");
define("REGISTER", "/register"):


include'../Global.php';
                 <ul>
                    <li><a href="<?php echo REGISTER; ?>">REGISTER</a></li>     
                    <li><a href="<?php echo LOGIN; ?>">LOG IN</a></li>
                </ul>

But there are times that whenever I click the Register, It directs to

http://mainpage/REGISTER

which is supposedly directs to

http://mainpage/register

Sometimes it directs to http://mainpage/REGISTER and sometimes it directs to http://mainpage/register

How I can avoid that?

I think what's best is.. for example..

In my Global.php I think I should declare the domain page and just concatenate the Global domain page in every subdomain page of my page..

Just like this..

define("MAIN", "http://mainpage/");

And I want to concatenate the global define domain in every page that I have hardcoded URLS. How I can achieve it?

For Example On my index.php (MAINPAGE) There is a button there that named LOGIN and REGISTER

So in my code.. I want to be it like this..

include'../Global.php';
                 <ul>
                    <li><a href="<?php echo REGISTER . (Whatever subdomain name that register is and concatenate to global define domain); ?>">REGISTER</a></li>        
                    <li><a href="<?php echo LOGIN . (Whatever subdomain name that login is and concatenate to global define domain); ?>">LOG IN</a></li>
                </ul>

I have different page for LOGIN and REGISTER.. But I think, I was mistaken by concatenating the Global Define Domain to subdomain and directory file.. How to get the subdomain and directory file of a page and put it into a variable and concatenate it to the Global define

Can somebody help me?

The problem you're facing occurs because your REGISTER constant uses domainless links that start with / that means it will take current domain and add link to it.

To solve that you can load Global.php file and then define REGISTER constant using already defined domain name.

For example:

include'../Global.php';
// notice that you need to include global.php before using MAIN constant
define("LOGIN", MAIN . "/login");
define("REGISTER", MAIN . "/register");

Couldn't you simply put this in your globals file:

<?php
  define("MAIN", "http://website.com");
  define("LOGIN", MAIN . "/login");
  define("REGISTER", MAIN . "/register");

And then in your other files:

<?php include "../Global.php"; ?>

<ul>
  <li><a href='<?php echo LOGIN; ?>'></a></li>
  <li><a href='<?php echo REGISTER; ?>'></a></li>
</ul>

That should work as intended if I understand your question correctly.