first commit

application/helpers/env_helper.php

@@ -0,0 +1,37 @@
+<?php defined('BASEPATH') or exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Online Appointment Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) Alex Tselegidis
+ * @license     https://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        https://easyappointments.org
+ * @since       v1.5.0
+ * ---------------------------------------------------------------------------- */
+
+if (!function_exists('env')) {
+    /**
+     * Gets the value of an environment variable.
+     *
+     * Example:
+     *
+     * $debug = env('debug', FALSE);
+     *
+     * @param string $key Environment key.
+     * @param mixed|null $default Default value in case the requested variable has no value.
+     *
+     * @return mixed
+     *
+     * @throws InvalidArgumentException
+     */
+    function env(string $key, mixed $default = null): mixed
+    {
+        if (empty($key)) {
+            throw new InvalidArgumentException('The $key argument cannot be empty.');
+        }
+
+        return $_ENV[$key] ?? $default;
+    }
+}