Added password lock to ticket system

Created php file to redirect to the ticket submit page when entering
right password

index.html

@@ -12,7 +12,7 @@
                 <h2>CSG Ticketsystem</h2>
                 <img src="./img/csg.png" width="100"/>
             </div>
-            <form action="" method="post">
+            <form action="./php/unlock.php" method="post">
                 <input type="password" name="password" id="password" placeholder="Passwort" required/>
                 <button type="submit">Login</button>
             </form>

php/unlock.php

@@ -0,0 +1,19 @@
+<?php
+session_start();
+
+$pass = "test123";
+$try = $_POST['password'] ?? '';
+$unlocked = false;
+
+if ($pass === $try) {
+    $unlocked = true;
+}
+
+if ($unlocked) {
+    $_SESSION['unlocked'] = true;
+    header("Location: ./ticket_lock.php");
+    exit;
+} else {
+    header("Location: ../index.html?error=1");
+    exit;
+}