PHP autoloader script, using SPL_AUTOLOAD_REGISTER.Just set the $dir, path relative from the autoloader file, optional exclude array for files not to include in the autoloader.It will include all files with namespace, others will be ignored.namespace follow PSR-0 standard, If using phpunit * phpunit --bootstrap autoload.php [testFile]

autoload.php

<?php
/**
 *
 * PHP autoloader script, using SPL_AUTOLOAD_REGISTER.
 * It will include all files with namespace, others will be ignored.
 *
 * namespace follow PSR-0 standard
 *
 * If using phpunit
 * phpunit --bootstrap autoload.php [testFile]
 *
 * @param $dir , path relative from the autoloader file,
 * @param $exclude , optional files not to include in the autoloader
 *
 */

$dir = 'classes';
$exclude = array(); //files to exclude


spl_autoload_register(
	function ($class) {
		static $classes = null;

		if ($classes === null) {
			$path = __DIR__ . "/".$GLOBALS['dir']."/";

			$objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path), FilesystemIterator::KEY_AS_PATHNAME);
			$classes = array();
			foreach ($objects as $file => $object) {
				$f = str_replace($path, '', $file);
				if (!in_array(str_replace('/','',substr($f, strripos($f, '/'))), array_merge($GLOBALS['exclude'], array(".", "..", substr(__FILE__, (strrpos(__FILE__, '/') + 1)))))) {
					$str = file_get_contents(__DIR__ . '/' . $GLOBALS['dir'] . '/' . $f);
					preg_match("/namespace\\s(.*?);/", $str, $matches);
					if (array_key_exists(1, $matches)){
						$classes = array_merge($classes, array(strtolower($matches[1]) . '\\' .strtolower(str_replace(array('/','.php'),'',substr($f, strripos($f, '/')))) => '/' . $GLOBALS['dir'] . '/' . $f));
					}
				}
			}

		}

		$cn = strtolower($class);
		if (isset($classes[$cn])) {
			require __DIR__ . $classes[$cn];
		}
	}
);