<?php

class SimpleLoader{

    public static function run($rules=array()){

        header("content-type:text/html;charset=utf-8");

        self::register();

        self::commandLine();

        self::router($rules);

        self::pathInfo();

    }

    //自动加载

    public static function loadClass($class){

        $class=str_replace('\\', '/', $class);

        $dir=str_replace('\\', '/', __DIR__);

        $class=$dir."/".$class.".php";

        if(!file_exists($class)){

            header("HTTP/1.1 404 Not Found");

        }

        require_once $class;

    }

    //命令行模式

    public static function commandLine(){

        if(php_sapi_name()=="cli"){

            $_SERVER['PATH_INFO']="";

            foreach ($_SERVER['argv'] as $k=>$v) {

                if($k==0) continue;

                $_SERVER['PATH_INFO'].="/".$v;

            }

        }

    }

    //路由模式

    public static function router($rules){

        if(isset($_SERVER['PATH_INFO']) && !empty($rules)){

            $pathInfo=ltrim($_SERVER['PATH_INFO'],"/");

            foreach ($rules as $k=>$v) {

                $reg="/".$k."/i";

                if(preg_match($reg,$pathInfo)){

                    $res=preg_replace($reg,$v,$pathInfo);

                    $_SERVER['PATH_INFO']='/'.$res;

                }

            }

        }

    }

    //pathinfo处理

    public static function pathInfo(){

        if(isset($_SERVER['PATH_INFO'])){

            $pathinfo=array_filter(explode("/", $_SERVER['PATH_INFO']));

            for($i=1;$i<=count($pathinfo);$i++){

                $key=isset($pathinfo[$i]) ? $pathinfo[$i] : '';

                $value=isset($pathinfo[$i+1]) ? $pathinfo[$i+1] :"";

                switch ($i) {

                    case 1:

                        $_GET['m']=ucfirst($key);

                        break;

                    case 2:

                        $_GET['c']=ucfirst($key);

                        break;

                    case 3:

                        $_GET['a']=$key;

                        break;

                    default:

                        if($i>3){

                            if($i%2==0){

                                $_GET[$key]=$value;

                            }

                        }

                        break;

                }

            }

        }

        $_GET['m']=!empty($_GET['m']) ? ucfirst($_GET['m']) : 'Index';

        $_GET['c']=!empty($_GET['c']) ? ucfirst($_GET['c']) : 'Index';

        $_GET['a']=!empty($_GET['a']) ? $_GET['a'] : 'index';

        $class="\\Controller\\{$_GET['m']}\\{$_GET['c']}";

        $controller=new $class;

        if(method_exists($controller, $_GET['a'])){

            $controller=new $class;

            $controller->$_GET['a']();

        }else{

            header("HTTP/1.1 404 Not Found");

            echo "404";

        }

    }

    //致命错误回调

    public static function shutdownCallback(){

        $e=error_get_last();

        if(!$e) return;

        self::myErrorHandler($e['type'],'<font color="red">Fatal Error</font> '.$e['message'],$e['file'],$e['line']);

    }

    //错误处理

    protected static function myErrorHandler($errno,$errstr,$errfile,$errline){

        list($micseconds,$seconds)=explode(" ",microtime());

        $micseconds=round($micseconds*1000);

        $micseconds=strlen($micseconds)==1 ? '0'.$micseconds : $micseconds;

        if(php_sapi_name()=="cli"){

            $break="\r\n";

        }else{

            $break="<br/>";

        }

        $mes="[".date("Y-m-d H:i:s",$seconds).":{$micseconds}] ".$errfile." ".$errline." line ".$errstr.$break;

        echo $mes;

    }

    //注册

    public static function register(){

        error_reporting(0);

        set_error_handler(function($errno,$errstr,$errfile,$errline){

            self::myErrorHandler($errno,$errstr,$errfile,$errline);

        });

        register_shutdown_function(function(){

            self::shutdownCallback();

        });

        spl_autoload_register("self::loadClass");

    }

}

<?php

//路由映射

$rules=array(

    '^user$'=>'User/User/getUserList',

    '^user\/(\d+)$'=>'User/User/getUserById/id/$1',

    '^user\/(\d+)\/article$'=>'User/User/getUserArticle/uid/$1'

);

require_once "SimpleLoader.php";

SimpleLoader::run($rules);

<?php

namespace Controller\User;

class User{

    public function getUserById(){

        echo "用户信息id {$_GET['id']} 的信息";

    }

    public function getUserList(){

        echo "用户列表";

    }

    public function getUserArticle(){

        echo "用户id {$_GET['uid']} 的文章列表";

    }

}