如何在多个文件上使用 Ajax 请求？

Question

I have a JavaScript file called newsletter_init.js and it makes an Ajax request.

I add this JS file to every .php on my project and the issue here.

For example I use newsletter_init.js in my index.php and a URL for the ajax request will be res/ajax/request_newsletter.php .

Ok, that's working but when I add the same JS file on another directory for example adding newsletter_init.js on a index.php but placed on blog folder the URL will be invalid as it will search for ../res/ajax/request_newsletter.php instead of res/ajax/request_newsletter.php .

File structure about the scope:

index.php
blog > index.php

I have another way to do this:

1. Add content of newsletter_init.js on every file and change url but this is not a good way to approach this.

2. I have tried to use __DIR___ in PHP but i don't understand how to use it in this situation.

3. I have tried $(location).attr(pathname); in jQuery but it return the fild name also for example localhost/homepage/index

4. I can't use a direct url as i will change from localhost to my site so, i need a dynamic way.

Answer 1

Just ensure your path is relative to the root directory.

/res/ajax/request_newsletter.php

Not:

res/ajax/request_newsletter.php

If you don't add the first slash, it will try to find that path starting in the directory where you are making the call (ie wherever your current PHP script is running).