PHP - SLIM API - 如何跨多个PHP文件共享变量，但请求具体

Question

I have a server running a API using Slim.

Each API request points to PHP code / functions divided in different PHP files. I'm not so heavy into PHP, and now I'm passing or setting variables in each class where needed.

I'm Wondering if there isn't a better way to set a REQUEST SCOPE 'global' variable that can be shared across the different PHP files? But are not shared between all the incoming request.

Should I:

• Work with Sessions?
• Work with a Singleton?
• ...

Code examples are difficult to give. This question fits more into a conceptual question.

Any good advice into accomplishing the sharing of variables across multiple PHP files, but with the REQUEST scope?

Answer 1

You should understand that your PHP application is initiated for each incoming request, so there is no way you can "share" data between requests accidentaly. I now cannot think of a way to do it on purpose, really.

As for "sharing information" between different files: the information is actually shared. Here's an example:

project/
    test.php
    mew.php

Content of test.php:

<?php
$foo = 'bar';
include 'mew.php';

Content of mew.php:

<?php
echo $foo; // accessing variable that was declared in "parent" file

Output of GET project/test.php request:

bar

So, you don't really have "sharing" problem.

Edit

From your comment I understand that you need some sort of client authentication. This can be done in many ways: from primitive and insecure authentication by IP address (using this middleware, for instance), classy HTTP authentication (tool for that), JWT is a good method (tool).

Conceptually it is simple: every client's request must be followed with some sort of token. When you recieve a request, you grab that token, identify client by it and return appropriate response.