autoload_like_composer.php

<?php

private static function autoload()
{
    spl_autoload_register(function ($class) {
        // Define base directories for known namespaces
        $baseDirs = [
            'Framework\\Core\\' => FRAMEWORK_PATH . 'Core/',
            'App\\'  => APP_PATH
        ];

        // Handle dynamic autoloading for Libraries
        $librariesDir = FRAMEWORK_PATH . 'Libraries/';
        $namespaceParts = explode('\\', $class);

        if (count($namespaceParts) > 1) {
            // Check if the first part of the namespace matches a known library
            $firstNamespace = array_shift($namespaceParts);
            $libraryDir = $librariesDir . $firstNamespace . '/src/';

            // If the directory exists, add it to the base directories
            if (is_dir($libraryDir)) {
                $baseDirs[$firstNamespace . '\\'] = $libraryDir;
            }
        }

        // Loop through each namespace prefix
        foreach ($baseDirs as $prefix => $baseDir) {
            // Check if the class uses the namespace prefix
            $prefixLength = strlen($prefix);
            if (strncmp($prefix, $class, $prefixLength) === 0) {
                // Get the relative class name
                $relativeClass = substr($class, $prefixLength);
                // Replace namespace separators with directory separators
                $file = $baseDir . str_replace('\\', '/', $relativeClass) . '.php';

                // If the file exists, require it
                if (file_exists($file)) {

                    require $file;
                    return;
                }
            }
        }
    });
}