Init core class, Init plugin functionnality

server/core/Plugin_Api.php

@@ -0,0 +1,24 @@
+<?php
+
+//Init plugin directory
+if (!defined('RCUBE_PLUGINS_DIR')) {
+    define('RCUBE_PLUGINS_DIR', RCUBE_INSTALL_PATH . 'plugins/');
+}
+
+class plugin_api{
+
+	static protected $instance;
+
+	protected function __construct(){
+
+	}
+
+	static function getInstance(){
+		
+		if(!self::$instance){
+			self::$instance = new plugin_api();
+		}
+
+		return self::$instance;
+	}
+}