API

<?php

 require_once 'DBhost.php';

 $response = array();

 if(isset($_GET['apicall'])){

        switch($_GET['apicall']){
            case 'signup':
                if(isTheseParametersAvailable(array('email','password','nama','gambar','skills','nope','alamat'))){
                $email = $_POST['email'];
                $password = md5($_POST['password']);
                $nama = $_POST['nama'];
                $gambar = $_POST['gambar'];
                $skills = $_POST['skills'];
                $nope = $_POST['nope'];
                $alamat = $_POST['alamat'];


                $stmt = $conn->prepare("SELECT email,password,nama,gambar,skills,nope,alamat FROM user WHERE  email = ?");
                $stmt->bind_param("s",$email);
                $stmt->execute();
                $stmt->store_result();

                if($stmt->num_rows > 0){
                    $response['error'] = true;
                    $response['message'] = 'User already registered';
                    $stmt->close();
                }else{
                    $stmt = $conn->prepare("INSERT INTO user (email, password, nama, gambar, skills, nope, alamat) VALUES (?, ?, ?, ?, ?, ?, ?)");
                    $stmt->bind_param("ssssssss", $email, $password, $nama, $skills, $gambar, $nope, $alamat);

                    if($stmt->execute()){
                        $stmt = $conn->prepare("SELECT id, email, password, nama, gambar, skills, nope, alamat FROM user WHERE email = ?");
                        $stmt->bind_param("s",$email);
                        $stmt->execute();
                        $stmt->bind_result($id,$email,$password,$nama,$gambar,$skills,$nope,$alamat);
                        $stmt->fetch();

                        $user = array(
                            'id'=>$id,
                            'email'=>$email,
                            'password'=>$password,
                            'nama'=>$nama,
                            'gambar'=>$gambar,
                            'skills'=>$skills,
                            'nope'=>$nope,
                            'alamat'=>$alamat
                        );
                        $stmt->close();

                        $response['error'] = false;
                        $response['message'] = 'User registered successfully';
                        $response['user'] = $user;
                    }
                }
            }else{
                $response['error'] = true;
                $response['message'] = 'required parameters are not available';
            }
        break;
        case 'edit':
                if(isTheseParametersAvailable(array('email','password','nama','gambar','skills','nope','alamat'))){
                $email = $_POST['email'];
                $password = md5($_POST['password']);
                $nama = $_POST['nama'];
                $gambar = $_POST['gambar'];
                $skills = $_POST['skills'];
                $nope = $_POST['nope'];
                $alamat = $_POST['alamat'];


                $stmt = $conn->prepare("SELECT email,password,nama,gambar,skills,nope,alamat FROM user WHERE email=?");
                $stmt->bind_param("s",$email);
                $stmt->execute();
                $stmt->store_result();

                if($stmt->num_rows > 0){
                    $stmt = $conn->prepare("UPDATE user SET password=?, nama=?, gambar=?, skills=?, nope=?, alamat=? WHERE  email=?");
                    $stmt->bind_param("ssssss", $password, $nama, $gambar, $skills, $nope, $alamat);

                    if($stmt->execute()){
                        $stmt = $conn->prepare("SELECT id, email, password, nama, gambar, skills, nope, alamat FROM user WHERE email=?");
                        $stmt->bind_param("s",$email);
                        $stmt->execute();
                        $stmt->bind_result($id,$email,$password,$nama,$gambar,$skills,$nope,$alamat);
                        $stmt->fetch();

                        $user = array(
                            'id'=>$id,
                            'email'=>$email,
                            'password'=>$password,
                            'nama'=>$nama,
                            'gambar'=>$gambar,
                            'skills'=>$skills,
                            'nope'=>$nope,
                            'alamat'=>$alamat
                        );
                        $stmt->close();

                        $response['error'] = false;
                        $response['message'] = 'User edited successfully';
                        $response['user'] = $user;
                    }
                }else{
                    $response['error'] = true;
                    $response['message'] = 'User not found';
                    $stmt->close();
                }
            }else{
                $response['error'] = true;
                $response['message'] = 'required parameters are not available';
            }
        break;
        case 'login':
            if(isTheseParametersAvailable(array('email', 'password'))){
                $email = $_POST['email'];
                $password = md5($_POST['password']);


                $stmt = $conn->prepare("SELECT id, email,password FROM user WHERE email = ? AND password = ?");
                $stmt->bind_param("ss",$email, $password);

                $stmt->execute();

                $stmt->store_result();

                if($stmt->num_rows > 0){
                    $stmt->bind_result($id, $email,$password);
                    $stmt->fetch();

                    $user = array(
			'id'=>$id,
                   	'email'=>$email,
                    	'password'=>$password
                    );

                    $response['error'] = false;
                    $response['message'] = 'Login successfull';
                    $response['user'] = $user;
                }else{
                    $response['error'] = false;
                    $response['message'] = 'Invalid username or password';
                }
            }
        break;
        case 'edit':
                if(isTheseParametersAvailable(array('email','password'))){
                $email = $_POST['email'];
                $password = md5($_POST['password']);
                $nama = $_POST['nama'];
                $gambar = $_POST['gambar'];
                $nope = $_POST['nope'];
                $alamat = $_POST['alamat'];
                $skills = $_POST['skills'];


                $stmt = $conn->prepare("SELECT email,password FROM user WHERE email=?");
                $stmt->bind_param("s",$email);
                $stmt->execute();
                $stmt->store_result();

                if($stmt->num_rows > 0){
                    $stmt = $conn->prepare("UPDATE user SET password=? WHERE  email=?");
                    $stmt->bind_param("ss", $password, $email);

                    if($stmt->execute()){
                        $stmt = $conn->prepare("SELECT id, email, password FROM user WHERE email=?");
                        $stmt->bind_param("s",$email);
                        $stmt->execute();
                        $stmt->bind_result($id,$email,$password);
                        $stmt->fetch();

                        $user = array(
                            'id'=>$id,
                            'email'=>$email,
                            'password'=>$password
                        );
                        $stmt->close();

                        $response['error'] = false;
                        $response['message'] = 'User edited successfully';
                        $response['user'] = $user;
                    }
                }else{
                    $response['error'] = true;
                    $response['message'] = 'User not found';
                    $stmt->close();
                }
            }else{
                $response['error'] = true;
                $response['message'] = 'required parameters are not available';
            }
        break;
        default:
            $response['error'] = true;
            $response['message'] = 'Invalid Operation Called';
    }
 }else{
    $response['error'] = true;
    $response['message'] = 'Invalid API Call';
 }

 echo json_encode($response); //sudah ada ini, sesuai format android di tutorial

 function isTheseParametersAvailable($params){
    foreach($params as $param){
        if(!isset($_POST[$param])){
            return false;
        }
    }
    return true;
 }