Added helper file with path related functions.

application/helpers/path_helper.php

@@ -0,0 +1,43 @@
+<?php defined('BASEPATH') or exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2020, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.1.0
+ * ---------------------------------------------------------------------------- */
+
+if ( ! function_exists('storage_path'))
+{
+    /**
+     * Get the path to the storage folder.
+     *
+     * @param string $path
+     *
+     * @return string
+     */
+    function storage_path(string $path = ''): string
+    {
+        return FCPATH . 'storage/' . trim($path);
+    }
+}
+
+if ( ! function_exists('base_path'))
+{
+    /**
+     * Get the path to the base of the current installation.
+     *
+     * @param string $path
+     *
+     * @return string
+     */
+    function base_path(string $path = ''): string
+    {
+        return FCPATH . trim($path);
+    }
+}
+