$Username= filter_var($_REQUEST['Username'], FILTER_SANITIZE_STRING, FILTER_FLAG_ENCODE_LOW);
$Password   = filter_var($_REQUEST['Password'], FILTER_SANITIZE_STRING, FILTER_FLAG_ENCODE_LOW);
$sql="SELECT Username, Password FROM doctoradd WHERE Username = :Username AND Password = :Password";
         //$sql  = "INSERT INTO technologies(name, description) VALUES(:Username, :Password)";
         $stmt    = $pdo->prepare($sql);
         $stmt->bindParam(':Username', $Username, PDO::PARAM_STR);
         $stmt->bindParam(':Password', $Password, PDO::PARAM_STR);
         $stmt->execute();
        while($row  = $stmt->fetch(PDO::FETCH_OBJ))
        {
        // Assign each row of data to associative array
        $data[] = $row;
        }
        if($data == []){
            echo json_encode("null");
        }
        else{
            echo json_encode("accepted");

        }

let Username  : string = this.form.controls["Username"].value,
 Password   : string    = this.form.controls["Password"].value;

     let body     : string   = "Username=" + Username + "&Password=" + Password,
     type     : string   = "application/x-www-form-urlencoded; charset=UTF-8",
     headers  : any      = new Headers({ 'Content-Type': type}),
     options  : any      = new RequestOptions({ headers: headers }),
     url      : any      = this.baseURI + "sign-in.php";

 this.http.post(url, body, options)
 .subscribe((data) =>
 {
    // If the request was successful notify the user
    // if(data.status === 200)
    // {
    //    //this.hideForm   = true;

    //    this.toast.create({
    //     message: 'Welcome ',
    //     duration:3000


    //           }).present();
    //    //this.sendNotification(`Congratulations the technology: ${username} was successfully added`);



    // }
    // // Otherwise let 'em know anyway
    // else
    // {
    //    //this.sendNotification('Something went wrong!');
    //    this.toast.create({
    //     message: 'Wrong Username or Password',
    //     duration:3000


    //           }).present();

    // }



 });


 this.SignIn();

SignIn(){
 this.http.get('http://localhost:10080/testdb/sign-in.php')
 .map(res => res.json())
 .subscribe(data =>
 {
    this.items = data;
 });
 alert(this.items);
 if(this.items=="accepted"){
  this.navCtrl.push('ExamplePage',this.username);
 }
 else{
  this.toast.create({
    message: 'Wrong Username or Password',
    duration:3000
          }).present();
 }