First Implementation

includes/UserDAO.php

@@ -0,0 +1,40 @@
+<?php
+
+class UserDAO {
+
+    private static array $users = [
+        [
+            "email" => "test@test.de",
+            "username" => "test",
+            "password" => "1234"
+        ]
+    ];
+
+    public function findUser($email) {
+        foreach (self::$users as $user) {
+            if ($user["email"] === $email) {
+                return $user;
+            }
+        }
+        return null;
+    }
+
+    public function addUser($email, $username, $password) {
+        self::$users[] = [
+            "email" => $email,
+            "username" => $username,
+            "password" => $password
+        ];
+    }
+
+    public function deleteUser($email) {
+        foreach (self::$users as $i => $user) {
+            if ($user["email"] === $email) {
+                unset(self::$users[$i]);
+                self::$users = array_values(self::$users);
+                return true;
+            }
+        }
+        return false;
+    }
+}