Untitled

<?php
// Include config file
require_once 'functions.php';


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


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

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

        if($stmt = mysqli_prepare($link, $sql)){
            // Bind variables to the prepared statement as parameters
            mysqli_stmt_bind_param($stmt, "s", $param_username);

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

            // Attempt to execute the prepared statement
            if(mysqli_stmt_execute($stmt)){
                /* store result */
                mysqli_stmt_store_result($stmt);

                if(mysqli_stmt_num_rows($stmt) == 1){
                    $username_err = "Uzytkownik juz istnieje.";
                } else{
                    $username = trim($_POST["username"]);
                }
            } else{
                echo "Oops!";
            }
        }

        // Close statement
        mysqli_stmt_close($stmt);
    }

    // Validate password
    if(empty(trim($_POST['password']))){
        $password_err = "Wprowadz haslo.";
    } elseif(strlen(trim($_POST['password'])) < 4){
        $password_err = "Haslo musi miec conajmniej 4 znaki.";
    } else{
        $password = trim($_POST['password']);
    }

   // Validate name
    if(empty(trim($_POST['name']))){
        $name_err = "Wprowadz imie.";
    } elseif(strlen(trim($_POST['name'])) < 1){
        $name_err = "Imie musi miec conajmniej jedna litere.";
    } else{
        $name = trim($_POST['name']);
    }

    // Validate  surname
    if(empty(trim($_POST['surname']))){
        $surname_err = "Wprowadz nazwisko.";
    } elseif(strlen(trim($_POST['surname'])) < 1){
        $surname_err = "Nazwisko musi miec conajmniej jeden znak.";
    } else{
        $surname = trim($_POST['surname']);
    }

    // Validate confirm password
    if(empty(trim($_POST["confirm_password"]))){
        $confirm_password_err = 'Wpisz haslo ponownie.';
    } else{
        $confirm_password = trim($_POST['confirm_password']);
        if($password != $confirm_password){
            $confirm_password_err = 'Hasla nie sa identyczne.';
        }
    }

    // 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, name, surname) VALUES (?, ?, ?, ?)";

        if($stmt = mysqli_prepare($link, $sql)){
            // Bind variables to the prepared statement as parameters
            mysqli_stmt_bind_param($stmt, "ssss", $param_username, $param_password, $param_name, $param_surname);

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

            // Attempt to execute the prepared statement
            if(mysqli_stmt_execute($stmt)){
                // Redirect to login page
		echo 'Konto zostalo utworzone. Nastapi przekierowanie.';
		sleep(2);
                header("location: login.php");
            } else{
                echo "Oops!";
            }
        }

        // Close statement
        mysqli_stmt_close($stmt);
    }

    // Close connection
    mysqli_close($link);
}


?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Rejestracja</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.css">
    <style type="text/css">
        body{ font: 14px sans-serif; }
        .wrapper{ width: 350px; padding: 20px; }
	form {

  text-align: center;

}
    </style>
</head>
<body>
    <div class="wrapper">
        <center><h2>RS1</h2>
        <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
            <div class="form-group <?php echo (!empty($username_err)) ? 'has-error' : ''; ?>">
                <label>Nazwa uzytkownika</label>
                <input type="text" name="username"class="form-control" value="<?php echo $username; ?>">
                <span class="help-block"><?php echo $username_err; ?></span>
            </div>
	     <div class="form-group <?php echo (!empty($name_err)) ? 'has-error' : ''; ?>">
                <label>Imie</label>
                <input type="text" name="name"class="form-control" value="<?php echo $name; ?>">
                <span class="help-block"><?php echo $name_err; ?></span>
            </div>
	     <div class="form-group <?php echo (!empty($surname_err)) ? 'has-error' : ''; ?>">
                <label>Nazwisko</label>
                <input type="text" name="surname"class="form-control" value="<?php echo $surname; ?>">
                <span class="help-block"><?php echo $surname_err; ?></span>
            </div>
            <div class="form-group <?php echo (!empty($password_err)) ? 'has-error' : ''; ?>">
                <label>Haslo</label>
                <input type="password" name="password" class="form-control" value="<?php echo $password; ?>">
                <span class="help-block"><?php echo $password_err; ?></span>
            </div>
            <div class="form-group <?php echo (!empty($confirm_password_err)) ? 'has-error' : ''; ?>">
                <label>Potwierdz haslo</label>
                <input type="password" name="confirm_password" class="form-control" value="<?php echo $confirm_password; ?>">
                <span class="help-block"><?php echo $confirm_password_err; ?></span>
            </div>
            <div class="form-group">
                <input type="submit" class="btn btn-primary" value="Submit">
                <input type="reset" class="btn btn-default" value="Reset">
            </div>
            <p>Masz juz konto? <a href="login.php">Zaloguj sie</a>!</p>
        </form></center>
    </div>

</body>
</html>