Module Package Naming (ARCH7010)

Key php.naming.namespace-psr4-naming · Severity info · Category naming

PSR-4 requires namespace segments to be PascalCase and to mirror the directory structure. snake_case or all-lowercase namespace segments break autoloading.

Incorrect

<?php

namespace app\billing_module;

class Invoice
{
    public function total(): int
    {
        return 0;
    }
}

Correct

<?php

namespace App\BillingModule;

class Invoice
{
    public function total(): int
    {
        return 0;
    }
}

Fix

Make namespace segments PascalCase and align them with the PSR-4 directory layout.