使用composer和PSR-0进行命名空间自动加载

Question

I want Implemente the namespace autoloading with composer and PSR-0, and I don't know why it dosen't work.

there is my file structure:

src
   |app
       | world 
              | World.php

       | user
             | User.php
vendor
Test.php
composer.json

in World.php

<?php

namespace world;
class World {
    public function hello() {
        return "hello world";
    }
}
?>

in User.php

<?php
namespace user; 
class User {
    public function hello() {
        return "hello user";
    }
}
?>

in composer.json

{
    "autoload": {
        "psr-0": {
            "my": "src/app"
        }
    }
}

and when I test this in Test.php :

<?php
require 'vendor/autoload.php';

class Myworld {
    public function testhello() {
        $w = new my\librairie\World();
        echo $w->hello();
        $u = new my\user\User();
        echo $u->hello();
    }
}

$m = new Myworld();
$m->testhello();
?>

I get this error :

Fatal error: Class 'my\\user\\User' not found

Fatal error: Class 'my\\world\\World' not found

what I miss !? Any advice would be welcome! thanks.

Answer 1

There is no namespace part "my" in your definitions.

namespace user; 
class User {...}

This class is named \\user\\User , not \\my\\user\\User .

The same applies to \\world\\World .

Consequently the namespace definition in Composer is wrong. You'd need two definitions for both user and world , both in the same directory:

{
    "autoload": {
        "psr-0": {
            "user\\": "src/app",
            "world\\": "src/app"
        }
    }
}