PHP Composer Autoloader Class not Found Exception

Question

The title speaks itself. So here is my project structure:

|src
    |Database
        |Core
            |MySQL.php
        |Support
    start.php
|vendor
comp         


        

Answer 1

You need to include namespace when you are initializing a class:

$mysql = new Database\Core\MySQL();

or

use Database\Core\MySQL;
$mysql = new MySQL();

See Using namespaces: Aliasing/Importing

Answer 2

Aside from not using the right use statement as already mentioned, PSR-4 does not work like that. It is more of an alias. You are essentially saying that src equals Database. So to have a directory named Database in there would imply that the fully qualified namespace + class equals 'Database\Database\Core\MySQL`. You want to use PSR-0 in this case, or adjust your PSR-4 definition.