Fatal Error: Class not Found when using namespaces

Question

I have been trying to use namespaces for the first time in ages and I am running into the below problem. I am currently using Composer for a PSR-4 autoloader and I keep getting the error: Fatal error: Class 'API\Library\Config' not found in C:\wamp64\www\project\src\index.php on line 14

composer.json

"autoload": {
    "psr-4": {
        "API\\": "src",
        "API\\Library\\": "src/Library",
        "API\\Controllers\\": "src/Application/Controllers"
    }
}

src/index.php

namespace API;
include_once('vendor/autoload.php');
use API\Library\Config;
$config = new Config(); //line 18

The Folder layout is as such:

Did you try "$ composer dump-autoload" to re-generate the autoload file? — dferenc
– dferenc, Commented Nov 23, 2017 at 10:45

Lawrence Cherone · Accepted Answer · 2017-11-23 10:45:17Z

2

Its because src is the parent folder. Ideally vendor would be in the same directory as src.

"autoload": {
    "psr-4": {
        "API\\": "",
        "API\\Library\\": "Library",
        "API\\Controllers\\": "Application/Controllers"
    }
}

Would work, or you should restructure your directories.

Also you can leave out "API\\Library\\": "Library", as it will be picked up by "API\\": "",

answered Nov 23, 2017 at 10:45

Lawrence Cherone

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2 Comments

Marc Towler Over a year ago

seems to be working, didn't think about the position of vendor being an issue so thank you!

Lawrence Cherone Over a year ago

np, easy mistake and we all been there :)

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