Router and Auth classes

auth.php

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+<?php 
+
+use PDO;
+
+class Auth{
+
+    private $pdo;
+
+    /**
+     * Constructor method to initialize the database connection and start the session
+     */
+
+    public function __construct($host, $dbname, $username, $password){
+        $dsn = "mysql:host=$host;dbname=$dbname;charset=utf8mb4";
+
+        /**
+         * Instantiate the PDO object with the DSN, username, and password, and set attributes. 
+         * Then start a new session
+        */
+        
+        $this->pdo = new PDO($dsn, $username. $password, [
+            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+        ]);
+
+        session_start();
+    }
+
+    /**
+    * Method to autenticate the user based on the provided routes.
+    */
+
+    public function login($username, $password){
+        $sql = "SELECT * FROM users WHERE username = :username or email = :email LIMIT 1";
+
+        /**
+         * Prepare the SQL query for execution.
+         * Then txecute the query with the provided username and password parameters and 
+         * fetch the user record from the database.
+         */
+        
+        $query = $this->pdo->prepare($query);
+        $query->execute([
+            ":username" => $username,
+            ":password" => $password
+        ]);
+        
+        $user = $query->fetch();
+
+        /**
+         * Check if the provided password is verified against the hashed password in the database.
+         * If correct, store user information in a session.
+         * 
+         * Return true indicating a successful login
+         */
+
+        if($user && password_verify($password, $user['password'])){
+            $_SESSION['user_id'] = $user['id'];
+            $_SESSION['username'] = $user['username'];
+
+            return true;
+        }
+
+        return false;
+    }
+
+}
+
+?>

router.php

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+<?php
+
+class Router{
+
+    /**
+     * Constructor method
+     * Executed when an instance of the Router class is created
+     */
+
+    public function __construct(){
+        /* Parse the URL from the request and extract the path part (e.g., "/home" from "http://example.com/home") */
+        $uri = parse_url($_SERVER['REQUEST_URI'])['path'];
+    }
+
+    /**
+     * Method to route the request to the appropriate controller 
+     * based on the provided routes
+     */
+
+    public function routeToController($routes){
+        // Check if the requested URI exists in the routes array
+        if(array_key_exists($this->uri, $routes)){
+            // If it exists, require (include and execute) the file corresponding to the route
+            require $routes[$uri];
+        }else{
+            // If the route doesn't exist, call the abort method to handle the error
+            $this->abort();
+        }
+    }
+
+    /**
+     * Method to handle HTTP errors 
+     * Default is 404 - Not Found
+     */
+
+    public function abort($code = 404){
+        // Set the HTTP response code to the specified value
+        http_response_code($code);
+        // Include and execute the corresponding error view (e.g., "views/404.php")
+        require "views/{$code}.php";
+        // Terminate the script execution
+        die();
+    }
+}
+
+// $routes = [
+//     '/' => 'controllers/index.php',
+//     '/about' => 'controllers/about.php',
+//     '/contact' => 'controllers/contact.php',
+// ];
+
+// $router = (new Router)->routeToController($routes);
+
+?>