Untitled

<?php
require 'core/dbconn.php';
include 'templates\nav.php';
session_start();

if (isset($_POST['register'])) {
    $fname = $_POST['fname'];
    $email = $_POST['email'];
    $username = $_POST['username'];
    $password = $_POST['password'];


    /**************** CHECK FOR ERRORS ****************/

    /*
    *
    *Check if Username is unique
    *
    */
    $userunique = $dbconn->query("SELECT username FROM users WHERE username = '$username' ");
    if ($userunique = 1) {
        $_SESSION['usernameError'] = "Username already in use, Choose another. <br>";
    }

    /*
    *
    *Check if Email is unique
    *
    */
    $emailunique = $dbconn->query("SELECT email FROM users WHERE email = '$email' ");
    if ($emailunique = 1) {
        $_SESSION['emailError'] = "Email already in use, Choose another.";
    }

    /**************** Hash Password ****************/

    $passwordsecure = password_hash($password, PASSWORD_DEFAULT);

    /**************** Generate Acvivation Code ****************/

    $active = uniqid();

    /**************** Escape Data ****************/
    $fname = mysql_real_escape_string($fname);
    $email = mysql_real_escape_string($email);
    $username = mysql_real_escape_string($username);
    $password = mysql_real_escape_string($passwordsecure);
    $active = mysql_real_escape_string($active);

    /**************** Insert Data ****************/

    $sql = $dbconn->query("INSERT INTO users (first_name, username, password, email, active) VALUES ('$fname' , '$username', '$password', '$email', '$active')");

    if ($sql) {
        /**************** Send Activation Email If Data is Inserted ****************/
        echo "You are registered";
    } else {
        echo "No sorry";
    }


}

 ?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <?php
    error_reporting('off');
    if ($_SESSION['usernameError']) {
        echo $_SESSION['usernameError'];
        die();
    }
    if ($_SESSION['emailError']) {
        echo $_SESSION['emailError'];
    }

    error_reporting('on');
     ?>
    <form action="" method="POST">
        <input type="text" name="fname" placeholder="first name" required="required">
        <br>
        <input type="text" name="username" placeholder="username" required="required">
        <br>
        <input type="email" name="email" placeholder="email" required="required">
        <br>
        <input type="password" name="password" placeholder="password" required="required">
        <br>
        <button type="submit" name="register">Sign Up</button>
    </form>
</body>
</html>