moved 2 properties to constants which seems more appropriate

reformatted single-line comments

examples/toggle_auto_update_settings.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * PHP API usage example
+ *
+ * contributed by: Art of WiFi
+ * description: example to toggle the site-wide auto upgrade setting on a UniFi controller
+ */
+
+/**
+ * using the composer autoloader
+ */
+require_once('vendor/autoload.php');
+
+/**
+ * include the config file (place your credentials etc. there if not already present)
+ * see the config.template.php file for an example
+ *
+ * @var string $controlleruser the user name for access to the UniFi Controller
+ * @var string $controllerpassword the password for access to the UniFi Controller
+ * @var string $controllerurl full url to the UniFi Controller, eg. 'https://
+ * @var string $controllerversion the version of the Controller software, eg. '4.6.6' (must be at least 4.0.0)
+ * @var bool $debug set to true (without quotes) to enable debug output to the browser and the PHP error log
+ */
+require_once('config.php');
+
+/**
+ * site id for the site where settings are to be updated
+ */
+$site_id = 'zzzzz';
+
+/**
+ * initialize the UniFi API connection class and log in to the controller to do our thing
+ */
+$unifi_connection = new UniFi_API\Client(
+    $controlleruser,
+    $controllerpassword,
+    $controllerurl,
+    $site_id,
+    $controllerversion
+);
+
+$login_results = $unifi_connection->login();
+
+if ($login_results) {
+    /**
+     * we get the current site mgmt settings
+     */
+    $current_site_settings = $unifi_connection->list_settings();
+
+    $mgmt_settings = [];
+    foreach ($current_site_settings as $section) {
+        if ($section->key == 'mgmt') {
+            $mgmt_settings = $section;
+        }
+    }
+
+    /**
+     * toggle the auto upgrade setting and set the auto upgrade hour to 3
+     */
+    $mgmt_settings->auto_upgrade      = !$mgmt_settings->auto_upgrade;
+    $mgmt_settings->auto_upgrade_hour = 3;
+    $mgmt_id                          = $mgmt_settings->_id;
+    $set_result                       = $unifi_connection->set_site_mgmt($mgmt_id, $mgmt_settings);
+
+    echo 'done' . PHP_EOL;
+    exit();
+}
+
+echo 'login failed' . PHP_EOL;