Can't get my autoloader to work with namespaces - php

Question

I'm having an issue with my folder structure in combination with my PHP files and their namespaces.
Here's my folder structure:
myproject
|
-- entry.php
-- src
|
-- IndexController.php
My entry.php looks like this:
<?php
spl_autoload_register(function (String $class) {
$sourcePath = __DIR__ . DIRECTORY_SEPARATOR . 'src';
$replaceRootPath = str_replace('myproject\Controllers', $sourcePath, $class);
$replaceDirectorySeparator = str_replace('\\', DIRECTORY_SEPARATOR, $replaceRootPath);
$filePath = $replaceDirectorySeparator . '.php';
if (file_exists($filePath)) {
require($filePath);
}
});
$indexController = new myproject\Controllers\IndexController;
$result = $indexController->controlSomething('this thing');
print($result);
My src/IndexController.php looks like this:
<?php
namespace myproject\Controllers;
class IndexController
{
public function controlSomething(string $something): string {
return $something;
}
}
This works perfectly fine. However, I want a bit of a different folder structure. I would like to go one folder deeper to keep my Controllers somewhere organised. So I want a Controllers folder to keep my Controllers there. Changing my folder structure to this:
myproject
|
-- entry.php
-- src
|
-- Controllers
|
-- IndexController.php
results in an error saying Class 'myproject\Controllers\IndexController' not found.
How can I achieve this? I've tried adding /Controllers to the code where paths and namespaces are defined, but I keep getting this error.

Answer 1

In your current setup, you've mapped the folder src to the base namespace myproject\Controllers. Whatever comes after myproject\Controllers, is expected to mirror a subdirectory structure starting at src.
What follows is the following: when you put IndexController in the directory src\Controllers, the autoloader would only find it if the full class name were myproject\Controllers\Controllers\IndexController.
What you probably want to do instead, is map src to myproject directly, eg.
$replaceRootPath = str_replace('myproject', $sourcePath, $class);
The solution I tend to favour, and is the current industry standard for php, is to use composer as autoloader.
Once installed, configuring your autoloader would become as simple as this json segment:
"autoload": {
"psr-4": {
"myproject\\": "src"
}
},
And, optionally,
"autoload-dev": {
"psr-4": {
"myproject\\Test\\": "tests"
}
},
Using composer has the additional benefit of being able to pull from a vast collection of open source modules to simplify your life.

Answer 2

Try
<?php
namespace myproject\src\Controllers;