Untitled

<?php
// Include config file
require_once "config.php";

// Define variables and initialize with empty values
$username = $password = $confirm_password = "";
$username_err = $password_err = $confirm_password_err = "";

// Processing form data when form is submitted
if($_SERVER["REQUEST_METHOD"] == "POST"){

    // Validate username
    if(empty(trim($_POST["username"]))){
        $username_err = "Please enter a username.";
    } else{
        // Prepare a select statement
        $sql = "SELECT id FROM users WHERE username = ?";

        if($stmt = $mysqli->prepare($sql)){
            // Bind variables to the prepared statement as parameters
            $stmt->bind_param("s", $param_username);

            // Set parameters
            $param_username = trim($_POST["username"]);

            // Attempt to execute the prepared statement
            if($stmt->execute()){
                // store result
                $stmt->store_result();

                if($stmt->num_rows == 1){
                    $username_err = "This username is already taken.";
                } else{
                    $username = trim($_POST["username"]);
                }
            } else{
                echo "Oops! Something went wrong. Please try again later.";
            }
        }

        // Close statement
        $stmt->close();
    }

    // Validate password
    if(empty(trim($_POST["password"]))){
        $password_err = "Please enter a password.";
    } elseif(strlen(trim($_POST["password"])) < 6){
        $password_err = "Password must have atleast 6 characters.";
    } else{
        $password = trim($_POST["password"]);
    }

    // Validate confirm password
    if(empty(trim($_POST["confirm_password"]))){
        $confirm_password_err = "Please confirm password.";
    } else{
        $confirm_password = trim($_POST["confirm_password"]);
        if(empty($password_err) && ($password != $confirm_password)){
            $confirm_password_err = "Password did not match.";
        }
    }

    // Check input errors before inserting in database
    if(empty($username_err) && empty($password_err) && empty($confirm_password_err)){

        // Prepare an insert statement
        $sql = "INSERT INTO users (username, password) VALUES (?, ?)";

        if($stmt = $mysqli->prepare($sql)){
            // Bind variables to the prepared statement as parameters
            $stmt->bind_param("ss", $param_username, $param_password);

            // Set parameters
            $param_username = $username;
            $param_password = password_hash($password, PASSWORD_DEFAULT); // Creates a password hash

            // Attempt to execute the prepared statement
            if($stmt->execute()){
                // Redirect to login page
                header("location: login.php");
            } else{
                echo "Something went wrong. Please try again later.";
            }
        }

        // Close statement
        $stmt->close();
    }

    // Close connection
    $mysqli->close();
}
?>

<html>
	<head>
		<link rel="icon" href="https://github.com/jchernin4/HWIDS/raw/master/Infinium%20Logo.png">
		<link href="style.css" rel="stylesheet" type="text/css" />
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width">
	</head>
	<body>
        <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post" style="border:1px solid #ccc">
            <div class="container">
                <h1>Sign Up</h1>
                <p>Please fill in this form to create an account.</p>
                <hr>

                <label for="email"><b>Email</b></label>
                <input type="email" placeholder="Enter Email" name="email" required>

                <label for="username"><b>Username</b></label>
                <input type="text" placeholder="Enter Username" name="username" required>

                <label for="password"><b>Password</b></label>
                <input type="password" placeholder="Enter Password" name="password" required>

                <label for="confirm_password"><b>Confirm Password</b></label>
                <input type="password" placeholder="Confirm Password" name="confirm_password" required>

                <label>
                    <input type="checkbox" checked="checked" name="remember" style="margin-bottom:15px"> Remember me
                </label>

                <p>By creating an account you agree to our <a href="#" style="color:dodgerblue">Terms & Privacy</a>.</p>

                <div class="clearfix">
                    <button type="button" class="cancelbtn">Cancel</button>
                    <button type="submit" class="signupbtn">Sign Up</button>
                </div>
            </div>
        </form>
    </body>
</html>