PHP MYSQL User Registration

0-PHP-USER-REG.MD

PHP MYSQL USER REGISTRATION

https://code-boxx.com/user-registration-php-mysql/

NOTES

1. Create a database and import 1-users.sql.
2. Edit 2-user-lib.php, change the database settings to your own.
3. Launch 3-register.php in the browser.

LICENSE

Copyright by Code Boxx

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

1-users.sql

CREATE TABLE `users` (
  `user_id` bigint(20) NOT NULL,
  `user_name` varchar(255) NOT NULL,
  `user_email` varchar(255) NOT NULL,
  `user_password` varchar(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

ALTER TABLE `users`
  ADD PRIMARY KEY (`user_id`),
  ADD UNIQUE KEY `user_email` (`user_email`);

ALTER TABLE `users`
  MODIFY `user_id` bigint(20) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=1;

2-user-lib.php

<?php
class Users {
  // (A) CONSTRUCTOR - CONNECT TO DATABASE
  private $pdo = null;
  private $stmt = null;
  public $error = null;
  function __construct () {
    $this->pdo = new PDO(
      "mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET,
      DB_USER, DB_PASSWORD, [
      PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
      PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
    ]);
  }

  // (B) DESTRUCTOR - CLOSE DATABASE CONNECTION
  function __destruct () {
    if ($this->stmt !== null) { $this->stmt = null; }
    if ($this->pdo !== null) { $this->pdo = null; }
  }

  // (C) RUN SQL QUERY
  // $sql : sql to run
  // $data : data to bind
  function query ($sql, $data=null) : void {
    $this->stmt = $this->pdo->prepare($sql);
    $this->stmt->execute($data);
  }

  // (D) GET USER BY ID OR EMAIL
  //  $id : email or user id
  function get ($id) {
    $this->query(sprintf("SELECT * FROM `users` WHERE `user_%s`=?",
      is_numeric($id) ? "id" : "email"
    ), [$id]);
    return $this->stmt->fetch();
  }

  // (E) REGISTER USER
  //  $name : user name
  //  $email : user email
  //  $pass : password
  function register ($name, $email, $pass) {
    // (E1) CHECK
    if (is_array($this->get($email))) {
      $this->error = "$email is already registered";
      return false;
    }

    // (E2) ADD NEW USER
    $this->query(
      "INSERT INTO `users` (`user_name`, `user_email`, `user_password`) VALUES (?,?,?)",
      [$name, $email, password_hash($pass, PASSWORD_DEFAULT)]
    );
    return true;
  }
}

// (F) DATABASE SETTINGS - CHANGE TO YOUR OWN!
define("DB_HOST", "localhost");
define("DB_NAME", "test");
define("DB_CHARSET", "utf8mb4");
define("DB_USER", "root");
define("DB_PASSWORD", "");

// (G) CREATE USER OBJECT
$USR = new Users();

3-register.css

* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
div.error {
  padding: 10px;
  margin-bottom: 10px;
  border: 1px solid #ff9797;
  background: #ffeaea;
}
#register {
  max-width: 400px;
  padding: 20px;
  border: 1px solid #e9e9e9;
  background: #f2f2f2;
}
#register h2 {
  padding: 0;
  margin: 0 0 10px 0;
}
#register input {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
}
#register input[type=text], #register input[type=email], #register input[type=password] {
  border: 1px solid #d9d9d9;
}
#register input[type=submit] {
  margin-top: 20px;
  color: #fff;
  background: #3c65c3;
  border: 0;
  cursor: pointer;
}

3-register.js

function check () {
  let pass = document.getElementsByName("pass")[0].value,
      cpass = document.getElementsByName("cpass")[0].value;
  if (pass != cpass) {
    alert("Passwords do not match");
    return false;
  } else { return true; }
}

3-register.php

<?php
/* (A) ALREADY SIGNED IN - TO HOME PAGE
if (isset($_SESSION["user"])) {
	header("Location: HOME.PAGE");
	exit();
}
*/

// (B) PROCESS REGISTRATION
if (count($_POST)>0) {
  require "2-user-lib.php";
  $pass = $USR->register($_POST["name"], $_POST["email"], $_POST["pass"]);
  if ($pass) {
    // header("Location: HOME.PAGE");
    exit("SUCCESSFUL!");
  }
}

// (C) REGISTRATION FORM ?>
<!DOCTYPE html>
<html>
  <head>
    <title>User Registration</title>
    <meta charset="utf-8">
    <link rel="stylesheet" href="3-register.css">
    <script src="3-register.js"></script>
  </head>
  <body>
    <!-- (C1) ERROR MESSAGE (IF ANY) -->
    <?php
    if (isset($pass) && $pass==false) {
      echo "<div class='error'>$USR->error</div>";
    } ?>

    <!-- (C2) REGISTRATION FORM -->
    <form method="post" id="register" onsubmit="return check()">
      <h2>REGISTER</h2>
      <input type="text" name="name" placeholder="Name" required>
      <input type="email" name="email" placeholder="Email" required>
      <input type="password" name="pass" placeholder="Password" required>
      <input type="password" name="cpass" placeholder="Confirm Password" required>
      <input type="submit" value="Register">
    </form>
  </body>
</html>