Added new helper file with debugging related functions

application/helpers/debug_helper.php

@@ -0,0 +1,31 @@
+<?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('dd'))
+{
+    /**
+     * Output the provided variables with "var_dump" and stop the execution.
+     * 
+     * Example:
+     * 
+     * dd($appointment, $service, $provider, $customer); 
+     *
+     * @param mixed ...$vars
+     */
+    function dd(...$vars)
+    {
+        var_dump($vars);
+
+        exit(1);
+    }
+}