How to make PHP authorization

Learn how to create a secure user authentication system in PHP with a step-by-step example.

PHP Authorization

In order to make authorization with PHP, first you need to set up a login form. You can do this by creating a simple HTML form with a username, password, and submit button. You'll also need to create a PHP file that will process the login form. This file will check the username and password against a database and determine if the user is allowed to access the content.

For example, let's say you want to create a login form using HTML and PHP. You can start by creating a basic HTML form with a username, password, and submit button:

<form action="login.php" method="post">
  <label for="username">Username:</label>
  <input type="text" name="username">
  <label for="password">Password:</label>
  <input type="password" name="password">
  <input type="submit" value="Login">
</form>

Save this HTML code as a file called "index.html". Now you need to create a PHP file that will process the login form. This file will check the username and password against a database and determine if the user is allowed to access the content.

$username = $_POST['username'];
$password = $_POST['password'];

// Connect to the database
$db = new mysqli('localhost', 'user', 'password', 'db');

// Check the username and password
$sql = "SELECT * FROM users WHERE username = '$username' AND password = '$password'";
$result = $db->query($sql);

if($result->num_rows > 0) {
  // Login successful
  session_start();
  $_SESSION['logged_in'] = true;
  header('Location: content.php');
} else {
  // Login failed
  header('Location: index.php?error=1');
}

Save this PHP code as a file called "login.php". This code will check to see if the username and password provided in the form match any entries in the database. If they do, the user will be allowed to access the content. If not, the user will be redirected to the login page again with an error message.

Now you have a working login system. The user can enter their username and password in the form, and if they match an entry in the database, they will be allowed to access the content. This is a basic example of how to make authorization with PHP.