autoload.php

<?php
/**
 * PSR-4 autoloader implementation for the DeviceDetector namespace.
 * First we define the 'dd_autoload' function, and then we register
 * it with 'spl_autoload_register' so that PHP knows to use it.
 */
/**
 * Automatically include the file that defines <code>class</code>.
 *
 * @param string $class
 *     the name of the class to load
 *
 * @return void
 */
function dd_autoload($class)
{
    $namespace_map = array('DeviceDetector\\' => __DIR__ . '/');
    foreach ($namespace_map as $prefix => $dir)
    {
        /* First swap out the namespace prefix with a directory... */
        $path = str_replace($prefix, $dir, $class);
        /* replace the namespace separator with a directory separator... */
        $path = str_replace('\\', '/', $path);
        /* and finally, add the PHP file extension to the result. */
        $path = $path . '.php';
        /* $path should now contain the path to a PHP file defining $class */
        @include $path;
    }
}
spl_autoload_register('dd_autoload');