Simple WordPress Autoloader

WordPressPosted on

If we develop a bit more complex theme or plugin where we want to use the modern PHP concepts, probably we want to use a simple autoloader for that. This snippet provides a starting point how could a basic WordPress compatible loader looks like. Replace the paths and the namespaces and you are ready to go!

// The autoloader takes care of automatic file loading.
// If the given class has the namespace we want, and
// the file exists we include it automatically.
spl_autoload_register(function ($class) {
    if (strpos($class, 'Your\\Namespace\\') !== 0) {

    $file = __DIR__ . sprintf('/your/files/%s.php', str_replace(['Your\\Namespace\\', '\\'], ['', '/'], $class));
    if (file_exists($file)) {
        require_once $file;

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