代码:

<?php/*@desc:自动加载类的函数@param dir 需要注册自动加载的文件夹*/function autoloader($dir){spl_autoload_register(function($name) use ($dir){ $name = str_replace('\\',DIRECTORY_SEPARATOR,$name); require $dir.DIRECTORY_SEPARATOR.$name.'.php';});}测试:

autoloader('a');use a\config;$config = new config();$config->say();输出:

hello