A Class is clearly created, but when referenced in another php file, it prompts class not found!

Question

Error message:

Fatal error: Uncaught Error: Class 'frameworkdbMysqli' not found in C:Users11500DesktopdemoProjecttestTest.php:7 Stack trace: #0 {main} thrown in C:Users11500DesktopdemoProjecttestTest.php on line 7

Project directory:

Class file:

Another php file:

Answer 1

You didn’t import the file, so PHP certainly doesn’t know where your class definition is = =

require '../db/Mysqli.php';

Add

at the beginning of the test file

Answer 2

Requires SPL loader

<?php
spl_autoload_register(function ($class) {
    include 'classes/' . $class . '.php';

Answer 3

For example,
use I want to use Huashan Sword Sect Dugu Nine Swords instead of Huashan Qi Sect Dugu Nine Swords

Of course, the prerequisite for you to use it is that you have it, everything is required