autoloader.php

<?php
/**
 * +----------------------------------------------------------------------
 * | swoolefy framework bases on swoole extension development, we can use it easily!
 * +----------------------------------------------------------------------
 * | Licensed ( https://opensource.org/licenses/MIT )
 * +----------------------------------------------------------------------
 * | @see https://github.com/bingcool/swoolefy
 * +----------------------------------------------------------------------
 */

class autoloader
{
    /**
     * $directory
     * @var string
     */
    private static $baseDirectory = START_DIR_ROOT;

    /**
     * Root Dir Map Namespace
     * @var array
     */
    private static $rootNamespace = ["<{APP_NAME}>"];

    /**
     * Class Map Namespace
     * @var array
     */
    private static $classMapNamespace = [];

    /**
     * @param string $className
     * @return void
     */
    public static function autoload($className)
    {
        if (isset(self::$classMapNamespace[$className])) {
            return;
        }
        foreach (self::$rootNamespace as $appDir => $namespace) {
            if (0 === strpos($className, $namespace)) {
                $parts = explode('\\', $className);
                if (!is_numeric($appDir)) {
                    $parts[0] = $appDir;
                }
                $filepath = self::$baseDirectory . DIRECTORY_SEPARATOR . implode(DIRECTORY_SEPARATOR, $parts) . '.php';
                if (is_file($filepath)) {
                    $res = require_once $filepath;
                    if ($res) {
                        self::$classMapNamespace[$className] = true;
                    }
                }
                break;
            }
        }
    }

    /**
     * register autoload
     */
    public static function register(bool $prepend = false)
    {
        if (!function_exists('__autoload')) {
            spl_autoload_register(['autoloader', 'autoload'], true, $prepend);
        } else {
            trigger_error('spl_autoload_register() which will bypass your __autoload() and may break your autoloading', E_USER_WARNING);
        }
    }
}

// include file
autoloader::register();
// include constants
include APP_PATH.'/Config/constants.php';