PHP实现的简单路由和类自动加载功能

<?php
define('WEBROOT', 'C:/Users/Administrator/Documents/NetBeansProjects/test');
require_once(WEBROOT.'/core/environment.php');
core__app::run(); //

<?php
//根据类名来include文件
class loader {
  //找到对应文件就include
  static function load($name) {
    $file = self::filepath($name);
    if ($file) {
      return include $file;
    }
  }
  static function filepath($name, $ext = '.php') {
    if (!$ext) {
      $ext = '.php';
    }
    $file = str_replace('__', '/', $name) . $ext; //类名转路径
    $path .= WEBROOT . '/' . $file;
    if (file_exists($path)) {
      return $path; //找到就返回
    }
    return null;
  }
}
spl_autoload_register('loader::load');

<?php
class core__app {
  static function run() {
    $a = $_SERVER['REQUEST_URI'];
    $uri = rtrim(preg_replace('/\?.*/', '', $_SERVER['REQUEST_URI']), '/');
    $params = explode('/', trim($uri, '/'));
    $count = count($params);
    if ($count > 1) {
      $controller = $params[0];
      $method = $params[1];
    } elseif ($count == 1) {
      $controller = 'index';
      $method = $params[0];
    } else {
    }
    $filename = WEBROOT . '/controller/' . $controller . '.php';
    $controller = 'controller__'.$controller;
    try {
      if (!file_exists($filename)) {
        throw new Exception('controller ' . $controller . ' is not exists!');
        return;
      }
      include($filename);
      if (!class_exists($controller)) {
        throw new Exception('class ' . $controller . ' is not exists');
        return;
      }
      $obj = new ReflectionClass($controller);
      if (!$obj->hasMethod($method)) {
        throw new Exception('method ' . $method . ' is not exists');
        return;
      }
    } catch (Exception $e) {
      echo $e; //展示错误结果
      return;
    }
    $newObj = new $controller();
    call_user_func_array(array($newObj, $method), $params);
  }
}

<?php
class controller__test {
  public function write($controller, $method) {
    //config__test::load('test');
    model__test::write($controller, $method);
  }
}

<?php
class model__test {
  public function write($model, $method) {
    echo 'From controller:'.$model.' to model: ' . $model . ' ,method: ' . $method;
  }
}