laravel_school_api_old/app/Support/Architecture/ArchitectureFileFinder.php

<?php declare(strict_types=1);

namespace App\Support\Architecture;

use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;

final class ArchitectureFileFinder
{
    /** @return string[] */
    public function phpFiles(array $paths): array
    {
        $files = [];
        foreach ($paths as $path) {
            $absolute = base_path($path);
            if (is_file($absolute) && str_ends_with($absolute, '.php')) {
                $files[] = $absolute;
                continue;
            }
            if (! is_dir($absolute)) {
                continue;
            }
            foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($absolute)) as $file) {
                if ($file->isFile() && $file->getExtension() === 'php') {
                    $files[] = $file->getPathname();
                }
            }
        }

        sort($files);
        return array_values(array_unique($files));
    }
}