I am writing the server part for my android application. For this, I use a server from AWC and a database on PhpMyAdmin. I got this error right away and I could not find a solution to it. Thinking that the problem is in my php code, I decided to use the guide which I used earlier for my other project and the server part worked perfectly. but now this error is constant and I cannot find the problem(((
below all I have now:
- here is my database
-
Constants.php
<?php define('DB_USERNAME', 'root'); define('DB_PASSWORD', '********'); define('DB_HOST', '35.172.242.128'); define('DB_NAME', 'retrofit'); define('USER_CREATED', 101); define('USER_EXIST', 102); define('USER_CREATION_FAILED', 103); -
DbConnect.php
<?php class DbConnect { //Variable to store database link private $con; //Class constructor function __construct() { } //This method will connect to the database function connect() { //Including the constants.php file to get the database constants include_once dirname(__FILE__) . '/Constants.php'; //connecting to mysql database $this->con = new mysqli(DB_HOST, DB_USERNAME, DB_PASSWORD, DB_NAME); //Checking if any error occured while connecting if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); return null; } //finally returning the connection link return $this->con; } } -
DbOperation.php
<?php class DbOperation { private $con; function __construct() { require_once dirname(__FILE__) . '/DbConnect.php'; $db = new DbConnect(); $this->con = $db->connect(); } //Method to create a new user function registerUser($name, $email, $pass, $gender) { if (!$this->isUserExist($email)) { $password = md5($pass); $stmt = $this->con->prepare("INSERT INTO users (name, email, password, gender) VALUES (?, ?, ?, ?)"); $stmt->bind_param("ssss", $name, $email, $password, $gender); if ($stmt->execute()) return USER_CREATED; return USER_CREATION_FAILED; } return USER_EXIST; } //Method for user login function userLogin($email, $pass) { $password = md5($pass); $stmt = $this->con->prepare("SELECT id FROM users WHERE email = ? AND password = ?"); $stmt->bind_param("ss", $email, $password); $stmt->execute(); $stmt->store_result(); return $stmt->num_rows > 0; } //Method to send a message to another user function sendMessage($from, $to, $title, $message) { $stmt = $this->con->prepare("INSERT INTO messages (from_users_id, to_users_id, title, message) VALUES (?, ?, ?, ?);"); $stmt->bind_param("iiss", $from, $to, $title, $message); if ($stmt->execute()) return true; return false; } //Method to update profile of user function updateProfile($id, $name, $email, $pass, $gender) { $password = md5($pass); $stmt = $this->con->prepare("UPDATE users SET name = ?, email = ?, password = ?, gender = ? WHERE id = ?"); $stmt->bind_param("ssssi", $name, $email, $password, $gender, $id); if ($stmt->execute()) return true; return false; } //Method to get messages of a particular user function getMessages($userid) { $stmt = $this->con->prepare("SELECT messages.id, (SELECT users.name FROM users WHERE users.id = messages.from_users_id) as `from`, (SELECT users.name FROM users WHERE users.id = messages.to_users_id) as `to`, messages.title, messages.message, messages.sentat FROM messages WHERE messages.to_users_id = ? ORDER BY messages.sentat DESC;"); $stmt->bind_param("i", $userid); $stmt->execute(); $stmt->bind_result($id, $from, $to, $title, $message, $sent); $messages = array(); while ($stmt->fetch()) { $temp = array(); $temp['id'] = $id; $temp['from'] = $from; $temp['to'] = $to; $temp['title'] = $title; $temp['message'] = $message; $temp['sent'] = $sent; array_push($messages, $temp); } return $messages; } //Method to get user by email function getUserByEmail($email) { $stmt = $this->con->prepare("SELECT id, name, email, gender FROM users WHERE email = ?"); $stmt->bind_param("s", $email); $stmt->execute(); $stmt->bind_result($id, $name, $email, $gender); $stmt->fetch(); $user = array(); $user['id'] = $id; $user['name'] = $name; $user['email'] = $email; $user['gender'] = $gender; return $user; } //Method to get all users function getAllUsers(){ $stmt = $this->con->prepare("SELECT id, name, email, gender FROM users"); $stmt->execute(); $stmt->bind_result($id, $name, $email, $gender); $users = array(); while($stmt->fetch()){ $temp = array(); $temp['id'] = $id; $temp['name'] = $name; $temp['email'] = $email; $temp['gender'] = $gender; array_push($users, $temp); } return $users; } //Method to check if email already exist function isUserExist($email) { $stmt = $this->con->prepare("SELECT id FROM users WHERE email = ?"); $stmt->bind_param("s", $email); $stmt->execute(); $stmt->store_result(); return $stmt->num_rows > 0; } } -
Index.php
<?php use \Psr\Http\Message\ServerRequestInterface as Request; use \Psr\Http\Message\ResponseInterface as Response; require '../vendor/autoload.php'; require_once '../includes/DbOperation.php'; //Creating a new app with the config to show errors $app = new \Slim\App([ 'settings' => [ 'displayErrorDetails' => true ] ]); //registering a new user $app->post('/register', function (Request $request, Response $response) { if (isTheseParametersAvailable(array('name', 'email', 'password', 'gender'))) { $requestData = $request->getParsedBody(); $name = $requestData['name']; $email = $requestData['email']; $password = $requestData['password']; $gender = $requestData['gender']; $db = new DbOperation(); $responseData = array(); $result = $db->registerUser($name, $email, $password, $gender); if ($result == USER_CREATED) { $responseData['error'] = false; $responseData['message'] = 'Registered successfully'; $responseData['user'] = $db->getUserByEmail($email); } elseif ($result == USER_CREATION_FAILED) { $responseData['error'] = true; $responseData['message'] = 'Some error occurred'; } elseif ($result == USER_EXIST) { $responseData['error'] = true; $responseData['message'] = 'This email already exist, please login'; } $response->getBody()->write(json_encode($responseData)); } }); //user login route $app->post('/login', function (Request $request, Response $response) { if (isTheseParametersAvailable(array('email', 'password'))) { $requestData = $request->getParsedBody(); $email = $requestData['email']; $password = $requestData['password']; $db = new DbOperation(); $responseData = array(); if ($db->userLogin($email, $password)) { $responseData['error'] = false; $responseData['user'] = $db->getUserByEmail($email); } else { $responseData['error'] = true; $responseData['message'] = 'Invalid email or password'; } $response->getBody()->write(json_encode($responseData)); } }); //getting all users $app->get('/users', function (Request $request, Response $response) { $db = new DbOperation(); $users = $db->getAllUsers(); $response->getBody()->write(json_encode(array("users" => $users))); }); //getting messages for a user $app->get('/messages/{id}', function (Request $request, Response $response) { $userid = $request->getAttribute('id'); $db = new DbOperation(); $messages = $db->getMessages($userid); $response->getBody()->write(json_encode(array("messages" => $messages))); }); //updating a user $app->post('/update/{id}', function (Request $request, Response $response) { if (isTheseParametersAvailable(array('name', 'email', 'password', 'gender'))) { $id = $request->getAttribute('id'); $requestData = $request->getParsedBody(); $name = $requestData['name']; $email = $requestData['email']; $password = $requestData['password']; $gender = $requestData['gender']; $db = new DbOperation(); $responseData = array(); if ($db->updateProfile($id, $name, $email, $password, $gender)) { $responseData['error'] = false; $responseData['message'] = 'Updated successfully'; $responseData['user'] = $db->getUserByEmail($email); } else { $responseData['error'] = true; $responseData['message'] = 'Not updated'; } $response->getBody()->write(json_encode($responseData)); } }); //sending message to user $app->post('/sendmessage', function (Request $request, Response $response) { if (isTheseParametersAvailable(array('from', 'to', 'title', 'message'))) { $requestData = $request->getParsedBody(); $from = $requestData['from']; $to = $requestData['to']; $title = $requestData['title']; $message = $requestData['message']; $db = new DbOperation(); $responseData = array(); if ($db->sendMessage($from, $to, $title, $message)) { $responseData['error'] = false; $responseData['message'] = 'Message sent successfully'; } else { $responseData['error'] = true; $responseData['message'] = 'Could not send message'; } $response->getBody()->write(json_encode($responseData)); } }); //function to check parameters function isTheseParametersAvailable($required_fields) { $error = false; $error_fields = ""; $request_params = $_REQUEST; foreach ($required_fields as $field) { if (!isset($request_params[$field]) || strlen(trim($request_params[$field])) <= 0) { $error = true; $error_fields .= $field . ', '; } } if ($error) { $response = array(); $response["error"] = true; $response["message"] = 'Required field(s) ' . substr($error_fields, 0, -2) . ' is missing or empty'; echo json_encode($response); return false; } return true; } $app->run();
