PHP如何实现RESTful原理

PHP如何实现RESTful原理

首先定义一个请求数据接收类；然后请求类中根据请求类型，进行访问不通方法；

 class Request   {       // 允许的请求方式       private static $method_type = array('get', 'post', 'put', 'patch', 'delete');        // 测试数据       private static $test_class = array(           1 => array('name'=>'测试一班','count'=>18),            2 => array('name'=>'测试二班','count'=>15)       );        public static function getRequest()       {           // 请求方法           $method = strtolower($_SERVER['REQUEST_METHOD']);           if (in_array($method, self::$method_type)) {               // 调用请求方法对应的方法               $data_name = $method . "Data";               return self::$data_name($_REQUEST);           }           return false;       }        // GET 获取信息       private static function getData($request_data)       {           $class_id = (int)$request_data['class'];           if ($class_id > 0) {               // GET /class/ID: 获取某个指定班的信息               return self::$test_class[$class_id];           }else{                // GET /class: 列出所有班级               return self::$test_class;           }       }        // POST /class 新建一个班级       private static function postData($request_data)       {           $class_id = (int)$request_data['class'];           if ($class_id == 0) {               return false;           }           $data = array();           if (!empty($request_data['name']) && isset($request_data['count'])) {               $data['name'] = $request_data['name'];               $data['count'] = $request_data['count'];               self::$test_class[] = $data;               return self::$test_class;            }else{               return false;           }       }        // PUT /class/ID 更新某个指定班级的信息(全部信息)       private static function putData($request_data)       {           $class_id = (int)$request_data['class'];           if ($class_id == 0) {               return false;           }            $data = array();           if (!empty($request_data['name']) && isset($request_data['count'])) {               $data['name'] = $request_data['name'];               $data['count'] = (int)$request_data['count'];               self::$test_class[$class_id] = $data;               return self::$test_class;           }else{               return false;           }       }        // PATCH /class/ID 更新某个指定班级的信息 (部分信息)       private static function pacthData($request_data)       {           $class_id = (int)$request_data['class'];           if ($class_id == 0) {               return false;           }           if (!empty($request_data['name'])) {               self::$test_class[$class_id]['name'] = $request_data['name'];           }           if (isset($request_data['count'])) {               self::$test_class[$class_id]['count'] = $request_data['count'];           }           return self::$test_class;       }        // DELETE /class/ID 删除某个班       private static function deleteData($request_data)       {           $class_id = (int)$request_data['class'];           if ($class_id == 0) {               return false;           }           unset(self::$test_class[$class_id]);           return self::$test_class;       }   }

再定义一个数据输出类，将数据输出的格式进行统一的封装；最后将方法返回的数据进行输出即可。

  <?php   /**   * 包含一个Response类，即输出类。根据接收到的Content-Type，将Request类返回的数组拼接成对应的格式，加上header后输出   */   class Response   {       const HTTP_VERSION = "HTTP/1.1";          public function sendResponse($data)       {           // 获取数据           if ($data) {               $code = 200;               $message = "OK";           }else{               $code = 404;               $data = array('error' => "Not Found");               $message = "Not Found";           }              header(self::HTTP_VERSION . " $code $message");           $content_type = isset($_SERVER['CONTENT_TYPE']) ? $_SERVER['CONTENT_TYPE'] : $_SERVER['HTTP_ACCEPT'];           if (strpos($content_type, 'application/json') !== false) {               header("Content-Type: application/json");               echo self::encodeJson($data);           }elseif (strpos($content_type, 'application/xml') !== false) {               header("Content-Type: application/xml");               echo self::encodeXml($data);           }else{               header("Content-Type: text/html");               echo self::encodeHtml($data);           }       }          // json 格式       private static function encodeJson($responseData)       {           return json_encode($responseData);       }          // xml 格式       private static function encodeXml($responseData)       {           $xml = new SimpleXMLElement('<?xml version="1.0"?><rest></rest>');           foreach ($responseData as $key => $value) {               if (is_array($value)) {                   foreach ($value as $k => $v) {                       $xml->addChild($k,$v);                   }               }else{                   $xml->addChild($key,$value);               }           }           return $xml->asXML();       }          // html 格式       private static function encodeHtml($responseData)       {           $html = "<table border='1'>";           foreach ($responseData as $key => $value) {               $html .= "<tr>";               if (is_array($value)) {                   foreach ($value as $k => $v) {                       $html .= "<td>$k</td><td>$v</td>";                   }               }else{                   $html .= "<td>$key</td><td>$value</td>";               }               $html .= "</tr>";           }           $html .="</table>";           return $html;       }   }   ?>

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