问如何将表单数据从Ionic 3传递到PHP文件？

EN

createEntry(name, description)
{
 let body    : string   = "testname=" + name + "&testval=" + description,
     type     : string   = "application/x-www-form-urlencoded; charset=UTF-8",
     url      : any      = this.baseURI + "manage-data.php",
     method : 'POST',
     headers  : any      = new Headers({ 'Content-Type': 'application/json' }),
     options  : any      = new RequestOptions({ headers: headers });

     alert(url);  //Output: http://localhost:1432/ionic-php-sql/manage-data.php
     alert(body); //Output: name=Test&description=Test
     alert(options); //[object Object]
     console.log(options);

     this.http
     .post(url, body)
     .subscribe(
         data => {
           console.log(data);
           alert(data);
           alert('success');
              if(data.status === 200)
               {
                  this.hideForm   = true;
                  this.sendNotification(`Congratulations the technology: ${name} was successfully added`);
               }
         },
         err => {
           console.log("ERROR!: ", err);
           alert(err);
         }
     );
}

 <?php
     header('Access-Control-Allow-Origin: *');
     header('Access-Control-Allow-Headers: X-Requested-With');
     header('Access-Control-Allow-Methods: POST, GET, OPTIONS');

     $con = mysqli_connect("localhost","root","","ionic_test");

     // Check connection
     if (mysqli_connect_errno())
     {
         echo "Failed to connect to MySQL: " . mysqli_connect_error();
      }
      else
      {
         echo "success !";
         if($_SERVER['REQUEST_METHOD']=='post')
         {
            echo "posting";
            $postdata = file_put_contents("php://input");
            $request = json_decode($postdata);
            var_dump($request);

            $name = $_POST["testname"];
            $desc = $_POST["testval"];

            $sql  = "INSERT INTO ionictest(testname, testval) VALUES ($name,$desc)";
            $stmt    = mysqli_query($con, $sql);
        }
     }
 ?>