Registration form in php using oop - php

Question

I just want to make a registration page but I'm stuck in this error -
Warning: Creating default object from empty value in
C:\wamp\www\2209login\register.php on line 25*
and this one ->
Fatal error: Call to undefined method stdClass::create() in
C:\wamp\www\2209login\register.php on line 30
database.php
<?php
// used to get mysql database connection
class Database{
// specify your own database credentials
private $host = "localhost";
private $db_name = "ooplogin";
private $username = "root";
private $password = "";
public $conn;
// get the database connection
public function getConnection(){
$this->conn = null;
try{
$this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
echo "connected";
}catch(PDOException $exception){
echo "Connection error: " . $exception->getMessage();
}
return $this->conn;
}
}
?>
user.php
<?php
// 'user' object
class User{
// database connection and table name
private $conn;
private $table_name = "users";
// object properties
public $id;
public $firstname;
public $lastname;
public $email;
// constructor
public function __construct($db){
$this->conn = $db;
// create new user record
function create(){
$query = "INSERT INTO
" . $this->table_name . "
SET
firstname = :firstname,
lastname = :lastname,
email = :email";
// prepare the query
$stmt = $this->conn->prepare($query);
// sanitize
$this->firstname=htmlspecialchars(strip_tags($this->firstname));
$this->lastname=htmlspecialchars(strip_tags($this->lastname));
$this->email=htmlspecialchars(strip_tags($this->email));
// bind the values
$stmt->bindParam(':firstname', $this->firstname);
$stmt->bindParam(':lastname', $this->lastname);
$stmt->bindParam(':email', $this->email);
// execute the query, also check if query was successful
if($stmt->execute()){
return true;
}else{
$this->showError($stmt);
return false;
}
}
}
}
register.php
<?php
// core configuration
//include_once "config/core.php";
// set page title
$page_title = "Register";
// include login checker
//include_once "login_checker.php";
// include classes
include_once 'config/database.php';
include_once 'objects/user.php';
//include_once "libs/php/utils.php";
// include page header HTML
//include_once "layout_head.php";
if($_POST){
// get database connection
$database = new Database();
$db = $database->getConnection();
$user->firstname=$_POST['firstname'];
$user->lastname=$_POST['lastname'];
$user->email=$_POST['email'];
// create the user
if($user->create()){
echo "<div class='alert alert-info'>";
echo "Successfully registered. <a href='{$home_url}login'>Please login</a>.";
echo "</div>";
}else{
echo "<div class='alert alert-danger' role='alert'>Unable to register. Please try again.</div>";
}
}
?>
<form action='register.php' method='post' id='register'>
<table class='table table-responsive'>
<tr>
<td class='width-30-percent'>Firstname</td>
<td><input type='text' name='firstname' class='form-control' required value="<?php echo isset($_POST['firstname']) ? htmlspecialchars($_POST['firstname'], ENT_QUOTES) : ""; ?>" /></td>
</tr>
<tr>
<td>Lastname</td>
<td><input type='text' name='lastname' class='form-control' required value="<?php echo isset($_POST['lastname']) ? htmlspecialchars($_POST['lastname'], ENT_QUOTES) : ""; ?>" /></td>
</tr>
<tr>
<td>Email</td>
<td><input type='email' name='email' class='form-control' required value="<?php echo isset($_POST['email']) ? htmlspecialchars($_POST['email'], ENT_QUOTES) : ""; ?>" /></td>
</tr>
<td></td>
<td>
<button type="submit" class="btn btn-primary">
<span class="glyphicon glyphicon-plus"></span> Register
</button>
</td>
</tr>
</table>
</form>
Neither data are inserting in database.
Thanks in advance.

Answer 1

You need to separate __construct and create method. In your current code create method is inside constructor, change your user class to:
// 'user' object
class User{
// database connection and table name
private $conn;
private $table_name = "users";
// object properties
public $id;
public $firstname;
public $lastname;
public $email;
// constructor
public function __construct($db){
$this->conn = $db;
}
// create new user record
public function create(){
$query = "INSERT INTO
" . $this->table_name . "
SET
firstname = :firstname,
lastname = :lastname,
email = :email";
// prepare the query
$stmt = $this->conn->prepare($query);
// sanitize
$this->firstname=htmlspecialchars(strip_tags($this->firstname));
$this->lastname=htmlspecialchars(strip_tags($this->lastname));
$this->email=htmlspecialchars(strip_tags($this->email));
// bind the values
$stmt->bindParam(':firstname', $this->firstname);
$stmt->bindParam(':lastname', $this->lastname);
$stmt->bindParam(':email', $this->email);
// execute the query, also check if query was successful
if($stmt->execute()){
return true;
}else{
$this->showError($stmt);
return false;
}
}
}

Answer 2

<?php
include 'db5.php';
//user data insertion in database
class B
{
public function register()
{
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
$username = mysqli_real_escape_string($obj->conn,$_POST['username']);
$email= mysqli_real_escape_string($obj->conn,$_POST['email']);
$password = mysqli_real_escape_string($obj->conn,$_POST['password']);
$repassword = mysqli_real_escape_string($obj->conn,$_POST['repassword']);
$password = md5($password);
$sql2 = "INSERT INTO opps(username, email, password, repassword) values('$username', '$email', '$password', '$repassword')";
$result = mysqli_query($obj->conn, $sql2) or die(mysqli_error($sql2));
echo "Registration Successfull!";
print_r($sql2);
//}
//else
//{
//echo "Registration Failed.";
//}
}
}
public function login()
{
if($_SERVER["REQUEST_METHOD"] == "POST")
{
// username and password sent from Form
$emailusername = mysqli_real_escape_string($obj->conn,$_POST['email']);
$password = mysqli_real_escape_string($obj->conn,$_POST['password']);
$password = md5($password);
$sql="SELECT * FROM opps WHERE email = '$emailusername' and password='$password'";
$result=mysqli_query($obj->conn,$sql);
$row=mysqli_fetch_array($result,MYSQLI_ASSOC);
//$active=$row['active'];
//$count=mysqli_num_rows($result);
if ($row['username']==$emailusername && $row['password']==$password)
{
echo "login successfully" .$row['username'];
}
else
{
echo "login failed";
}
}
}
$obj2 = new B();
$obj2->register();
$obj2->login();
?>