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server.php
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server.php
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<?php
session_start();
$username = "";
$email = "";
$password_1 = "";
$password_2 = "";
$errors = array();
//connect to db
$db = mysqli_connect('localhost','root','','registration');
//if the register button is clicked
if (isset($_POST['register'])){
$username = mysqli_real_escape_string($db, $_POST['username']);
$email = mysqli_real_escape_string($db, $_POST['email']);
$password_1 = mysqli_real_escape_string($db, $_POST['password_1']);
$password_2 = mysqli_real_escape_string($db, $_POST['password_2']);
//ensure that form fields are filled properly
if (empty($username)){
array_push($errors,"Username is required!");
}
if (empty($email)){
array_push($errors,"Email is required!");
}
if (empty($password_1)){
array_push($errors,"Password is required!");
}
if($password_1 != $password_2){
array_push($errors,"Password does not match!");
}
//if no errors saving users into db
if(count($errors) == 0){
$password = md5($password_1); //password encryption
$sql = "INSERT INTO users(username,email,password)
VALUES('$username','$email','$password')";
mysqli_query($db,$sql);
header('location: login.php');
//echo "You have registered successfully! Now log in from here";(in future)
}
}
//log user in
if (isset($_POST['login'])){
$username = mysqli_real_escape_string($db, $_POST['username']);
$password = mysqli_real_escape_string($db, $_POST['password']);
//ensure that form fields are filled properly
if(empty($username)){
array_push($errors,"Username is required");
}
if(empty($password)){
array_push($errors,"Password is required");
}
if (count($errors) == 0){
$password = md5($password); //encrypt password before comparing from that of database
$query = "SELECT * FROM users WHERE username='$username' AND password='$password'";
$result = mysqli_query($db, $query);
if (mysqli_num_rows($result) == 1){
//log user in
$_SESSION['username'] = $username;
$_SESSION['success'] = "You are now logged in!";
header('location: indexTest.php'); //redirect to home page
}
else{
array_push($errors,"Wrong username or password!");
}
}
}
//logout
if (isset($_GET['logout'])){
session_destroy();
unset($_SESSION['username']);
header('location: login.php');
}
?>