Autoloading namespaces

Question

I am creating my own MVC framework for a simple website and I want to use namespaces but I don't know how to autoload them. Here is what I tried so far:

I have a init.php file that has autoloading function:

    spl_autoload_register(function($class){
    $file = __DIR__ . '/../' . str_replace('\\', '/', $class) .'.php';
    echo $file;
    if (file_exists($file)) {
        require_once $file;
        echo 'yes';
    }

    use App\Core\App as App;

    $app = new App;

This code returns "yes" so it locates the App file.. But it also returns a fatal error: D:\xampp\htdocs\MVC\App/../App/Core/App.phpyes Fatal error: Class 'App\Core\App' not found in D:\xampp\htdocs\MVC\App\init.php on line 28 Line 28 is $app = new App;

Here is how I am namespacing my App file:

    <?php

    namespace App\Core\App;

    class App 
    {
    .....

The file structure is the following:

| App
|--| Core
|--|--| App.php
...
| init.php

Any ideas why?

It could be the directory path, is it D:\xampp\htdocs\MVC\App\App\Core\App.php? — Lawrence Cherone
– Lawrence Cherone, Commented Sep 10, 2017 at 18:45
Then like Chris says your need to change your namespace or fix the directory structure. It's echoing out what it is. D:\xampp\htdocs\MVC\App/../App/Core/App.php — Lawrence Cherone
– Lawrence Cherone, Commented Sep 10, 2017 at 18:47
The namespace for your class App should be namespace App\Core; — Benni
– Benni, Commented Sep 10, 2017 at 18:48
If your namespace is namespace App\Core\App; and your class is App it would be $app = new App\Core\App\App(); can you see how that's confusing lol — Lawrence Cherone
– Lawrence Cherone, Commented Sep 10, 2017 at 18:51

tereško · Accepted Answer · 2017-09-11 14:59:27Z

1

Instead of making your own autoloader, just use the one, that comes built-in with composer. You just add the following segment in the composer.json file and it's done:

"autoload": {
  "psr-4": {
    "": "dir_where_namespaces_start...usually_src"
  }
}

Also, you can't really make and "mvc framework", because MVC architecture is what the application code implements and no the framework.

answered Sep 11, 2017 at 14:59

tereško

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1 Comment

user3628807 Over a year ago

This is genius and works like a charm! Didn't know that you can do this with composer.

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