REST and RESTfull web service

<form action="resource" method="post">
    <input name="id" value="101"/>
    <input name="name" value="rock"/>
    <button name="method" value="get" type="submit">Query(Get)</button>
</form>

<?php
/**
 * 對動態語言而言，不用 interface 也可以。
 * 如果你不習慣動態語言的使用方式，不用 interface 覺得沒有安全感，
 * 那就用吧。 
 */ 
interface RESTMethod {
    public function restGet($segments);
    public function restPost($segments);
    public function restPut($segments);
    public function restDelete($segments);
}


class Controller /*implements RESTMethod*/ {
    public function index() {
        echo 'create|read|update|delete';
    }
    
    // RESTful: controller/id  by POST.
    // traditional: controller/create
    public function create() {
        echo 'create new resource';
    }
    
    // RESTful: controller/id  by GET.
    // traditional: controller/id or controller/read/id
    public function read($id) {
        echo 'read resource: ' . $id;
    }
   
    // RESTful: controller/id  by PUT.
    // traditional: controller/update/id  with POST data.
    public function update($id=false) {
        if ( !$id )
            return $this->create();
        echo 'update resource: '. $id;
    }
   
    // RESTful: controller/id  by DELETE.
    // traditional: controller/delete/id
    public function delete($id) {
        echo 'delete resource: '. $id;
    }


    public function restPost($segments) {
        echo 'invoke restPost.';
        readfile('php://input'); // read the raw put data. 
        return $this->create();
    }
    
    public function restGet($segments) {
        echo 'invoke restGet.';
        return $this->read($segments[0]);
    }
    
    public function restPut($segments) {
        echo 'invoke restPut.';
        return $this->update($segments[0]);
    }
    
    public function restDelete($segments) {
        echo 'invoke restDelete.';
        return $this->delete($segments[0]);
    }
}
?>

<?php
class Loader {
    private $control;
    private $segments;
    
    //private $RESTMethodMap;
    
    function __construct($Controller) {
        //$this->control = new $controllerConfig['controllerName'];
        //$this->RESTMethodMap = $controllerConfig['RESTMethodMap'];
        $this->control = new $Controller;
    } 

    function run() {
        if (PHP_SAPI == 'cli') {
            global $argv;
            $_SERVER['PATH_INFO'] = '/' . implode('/', array_slice($argv, 1));
        }

        if ( !isset($_SERVER['PATH_INFO']) or $_SERVER['PATH_INFO'] == '/') {
            $this->segments = false;
        }
        else {
            $this->segments = explode('/', $_SERVER['PATH_INFO']);
        }
        
        if ( !$this->segments ) { // Without parameter
            return $this->control->index(); 
        }
        
        if (method_exists($this->control, $this->segments[1])) {
            //request resource by traditional way.
            $method = $this->segments[1];

            //deny directly invoke method of interface RESTMethod
            if (strpos($method, 'rest') === 0) { 
                header('HTTP/1.0 403 Forbidden');
                echo 'The server understood the request, but is refusing to fulfill it.
                     Authorization will not help and the request SHOULD NOT be repeated.';
                return false;
            }

            $objMethod = array(
                $this->control,
                $method
            );
            $arguments = array_slice($this->segments, 2);
            
            call_user_func_array($objMethod, $arguments);
        }
        else {
            //request resource by RESTful way.
            //$method = $this->RESTMethodMap[$_SERVER['REQUEST_METHOD']];
            $method = 'rest' . ucfirst(strtolower($_SERVER['REQUEST_METHOD']));
            $arguments = array_slice($this->segments, 1);
            
            $this->control->$method($arguments);
        }
    }
} //end class Loader

/*
$controllerConfig = array(
    'controllerName' => 'Controller',
    'RESTMethodMap'  => array(
            'GET'   =>  'read',
            'POST'  =>  'create',
            'PUT'   =>  'update',
            'DELETE'=>  'delete'
        )
);
*/

$loader = new Loader('Controller');

//$loader->run($controllerConfig);
$loader->run();
?>