AutoLoader.php

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<?php
class AutoLoader {
 
    static private $classNames = array();
 
    /**
     * Store the filename (sans extension) & full path of all ".php" files found
     */
    public static function registerDirectory($dirName) {
 
        $di = new DirectoryIterator($dirName);
        foreach ($di as $file) {
 
            if ($file->isDir() && !$file->isLink() && !$file->isDot()) {
                // recurse into directories other than a few special ones
                self::registerDirectory($file->getPathname());
            } elseif (substr($file->getFilename(), -4) === '.php') {
                // save the class name / path of a .php file found
                $className = substr($file->getFilename(), 0, -4);
                AutoLoader::registerClass($className, $file->getPathname());
            }
        }
    }
 
    /**
     * @param string $className
     * @param string $fileName
     */
    public static function registerClass($className, $fileName) {
        AutoLoader::$classNames[$className] = $fileName;
    }
 
    public static function loadClass($className) {
        if (isset(AutoLoader::$classNames[$className])) {
            require_once(AutoLoader::$classNames[$className]);
        }
     }
 
}
 
spl_autoload_register(array('AutoLoader', 'loadClass'));