PHP Request and Response Classes for CRUD Operations

The Request.php file defines a Request class that acts as a data‑operation layer. It supports the HTTP methods GET, POST, PUT, PATCH, and DELETE, routing each method to a corresponding private static function ( getData , postData , putData , patchData , deleteData ) which manipulate a static test data array representing class information.

<?php
/**
 * 数据操作类
 */
class Request {
    private static $method_type = array('get','post','put','patch','delete');
    private static $test_class = array(
        1 => array('name'=>'托福班','count'=>18),
        2 => array('name'=>'雅思班','count'=>20),
    );
    public static function getRequest(){
        $method = strtolower($_SERVER['REQUEST_METHOD']);
        if(in_array($method,self::$method_type)){
            $data_name = $method.'Data';
            return self::$data_name($_REQUEST);
        }
        return false;
    }
    private static function getData($request_data){
        $class_id = (int)$request_data['class'];
        if($class_id>0){
            return self::$test_class[$class_id];
        }else{
            return self::$test_class;
        }
    }
    private static function postData($request_data){
        if(!empty($request_data['name'])){
            $data['name'] = $request_data['name'];
            $data['count'] = (int)$request_data['count'];
            self::$test_class[] = $data;
            return self::$test_class;
        }else{
            return false;
        }
    }
    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;}
    }
    private static function patchData($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'] = (int)$request_data['count'];
        }
        return self::$test_class;
    }
    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;
    }
}
?>

The Response.php file provides a Response class that formats the data returned by Request . Depending on the incoming Content‑Type , it encodes the data as JSON, XML, or an HTML table and sends the appropriate HTTP headers.

<?php
class Response {
    const HTTP_VERSION = "HTTP/1.1";
    public static function sendResponse($data){
        if($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);
        }
    }
    private static function encodeJson($responseData){
        return json_encode($responseData);
    }
    private static function encodeXml($responseData){
        $xml = new SimpleXMLElement('
');
        foreach($responseData as $key=>$value){
            if(is_array($value)){
                foreach($value as $k=>$v){
                    $xml->addChild($k,$v);
                }
            }else{
                $xml->addChild($key,$value);
            }
        }
        return $xml->asXML();
    }
    private static function encodeHtml($responseData){
        $html = "
";
        foreach($responseData as $key=>$value){
            $html .= "
";
            if(is_array($value)){
                foreach($value as $k=>$v){
                    $html .= "
".$k."
".$v."
";
                }
            }else{
                $html .= "
".$key."
".$value."
";
            }
            $html .= "
";
        }
        $html .= "
";
        return $html;
    }
}
?>

The index.php file serves as the entry point of the application. It includes both Request.php and Response.php , obtains the processed request data via Request::getRequest() , and then passes that data to Response::sendResponse() for output.

<?php
require('Request.php');
require('Response.php');
$data = Request::getRequest();
Response::sendResponse($data);
?>