skapade registrering, logga in och logga ut. ändrade lite i auth.php

inc/php/register.php

@@ -0,0 +1,67 @@
+<?php
+session_start();
+require_once($_SERVER['DOCUMENT_ROOT'] . '/db.php');
+
+$errors = [];
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $username = trim($_POST['username'] ?? '');
+    $email = trim($_POST['email'] ?? '');
+    $password = $_POST['password'] ?? '';
+
+    // Validate inputs
+    if (empty($username) || empty($email) || empty($password)) {
+        $errors[] = "All fields are required.";
+    }
+
+    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
+        $errors[] = "Invalid email format.";
+    }
+
+    if (strlen($password) < 6) {
+        $errors[] = "Password must be at least 6 characters.";
+    }
+
+    if (empty($errors)) {
+        $conn = getConnection();
+
+        // Check if email or username already exists
+        $stmt = $conn->prepare("SELECT id FROM users WHERE email = :email OR username = :username");
+        $stmt->execute(['email' => $email, 'username' => $username]);
+
+        if ($stmt->fetch()) {
+            $errors[] = "Email or username already in use.";
+        } else {
+            $hash = password_hash($password, PASSWORD_BCRYPT, ['cost' => 12]);
+            $uniqueId = bin2hex(random_bytes(16)); // session ID
+
+            $insert = $conn->prepare("INSERT INTO users (username, email, password, uniqueid) VALUES (:username, :email, :password, :uniqueid)");
+            $insert->execute([
+                'username' => $username,
+                'email' => $email,
+                'password' => $hash,
+                'uniqueid' => $uniqueId,
+            ]);
+
+            $_SESSION['user_id'] = $conn->lastInsertId();
+            $_SESSION['uniqueid'] = $uniqueId;
+
+            header("Location: /home.php");
+            exit();
+        }
+    }
+}
+?>
+
+<!-- Basic form UI -->
+<h2>Register</h2>
+<form method="POST">
+    <input name="username" placeholder="Username" required><br>
+    <input name="email" type="email" placeholder="Email" required><br>
+    <input name="password" type="password" placeholder="Password" required><br>
+    <button type="submit">Register</button>
+</form>
+
+<?php if (!empty($errors)): ?>
+    <ul><?php foreach ($errors as $e) echo "<li>$e</li>"; ?></ul>
+<?php endif; ?>