Переделка для composer autoload

src/session.php

@@ -0,0 +1,36 @@
+<?php
+
+class Session 
+{
+    function get($key)
+    {
+        if (isset($_SESSION[$key])) {
+            return $_SESSION[$key];
+        }
+        return null;
+    }
+
+    function set($key, $value)
+    {
+        if (is_array($key)) {
+            $_SESSION[strtolower(get_class($key[0]))][$key[1]] = $value;
+        } else {
+            $_SESSION[$key] = $value;
+        }
+    }
+
+    function clean($key)
+    {
+        unset($_SESSION[$key]);
+    }
+
+    function start()
+    {
+        session_start();
+    }
+
+    function stop()
+    {
+        session_destroy();
+    }
+}