feat: Add Traditional Chinese language file & fix: Resolve all PHP warnings and modernize for DokuWiki 2025-05-14a compatibility

action.php

@@ -9,7 +9,7 @@
 if(!defined('DOKU_INC')) die();
 
 if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN', DOKU_INC . 'lib/plugins/');
-require_once(DOKU_PLUGIN . 'action.php');
+// Using autoloading instead of require_once for better compatibility
 
 class action_plugin_statistics extends DokuWiki_Action_Plugin {
 
@@ -113,13 +113,13 @@ function loglogins(Doku_Event $event, $param) {
         $act  = $this->_act_clean($event->data);
         if($act == 'logout') {
             $type = 'o';
-        } elseif($_SERVER['REMOTE_USER'] && $act == 'login') {
-            if($_REQUEST['r']) {
+        } elseif(isset($_SERVER['REMOTE_USER']) && $_SERVER['REMOTE_USER'] && $act == 'login') {
+            if(isset($_REQUEST['r']) && $_REQUEST['r']) {
                 $type = 'p';
             } else {
                 $type = 'l';
             }
-        } elseif($_REQUEST['u'] && !$_REQUEST['http_credentials'] && !$_SERVER['REMOTE_USER']) {
+        } elseif(isset($_REQUEST['u']) && $_REQUEST['u'] && !isset($_REQUEST['http_credentials']) && !isset($_SERVER['REMOTE_USER'])) {
             $type = 'f';
         }
         if(!$type) return;

admin.php

@@ -108,11 +108,14 @@ public function getMenuSort() {
      * handle user request
      */
     public function handle() {
-        $this->opt = preg_replace('/[^a-z]+/', '', $_REQUEST['opt']);
+        $this->opt = preg_replace('/[^a-z]+/', '', isset($_REQUEST['opt']) ? $_REQUEST['opt'] : '');
         if(!in_array($this->opt, $this->allowedpages)) $this->opt = 'dashboard';
 
-        $this->start = (int) $_REQUEST['s'];
-        $this->setTimeframe($_REQUEST['f'], $_REQUEST['t']);
+        $this->start = (int) (isset($_REQUEST['s']) ? $_REQUEST['s'] : 0);
+        $this->setTimeframe(
+            isset($_REQUEST['f']) ? $_REQUEST['f'] : '',
+            isset($_REQUEST['t']) ? $_REQUEST['t'] : ''
+        );
     }
 
     /**

helper.php

@@ -102,7 +102,10 @@ public function runSQL($sql_string) {
 
         $result = mysqli_query($link, $sql_string);
         if($result === false) {
-            dbglog('DB Error: ' . mysqli_error($link) . ' ' . hsc($sql_string), -1);
+            // Using modern logger instead of deprecated dbglog
+            if (class_exists('\dokuwiki\Logger')) {
+                \dokuwiki\Logger::error('DB Error: ' . mysqli_error($link) . ' ' . hsc($sql_string));
+            }
             msg('DB Error: ' . mysqli_error($link) . ' ' . hsc($sql_string), -1);
             return null;
         }

img.php

@@ -15,7 +15,12 @@
 $plugin = plugin_load('helper', 'statistics');
 try {
     if(!auth_ismanager()) throw new Exception('Access denied');
-    $plugin->Graph()->render($_REQUEST['img'], $_REQUEST['f'], $_REQUEST['t'], $_REQUEST['s']);
+    $plugin->Graph()->render(
+        isset($_REQUEST['img']) ? $_REQUEST['img'] : '',
+        isset($_REQUEST['f']) ? $_REQUEST['f'] : '',
+        isset($_REQUEST['t']) ? $_REQUEST['t'] : '',
+        isset($_REQUEST['s']) ? $_REQUEST['s'] : ''
+    );
 } catch(Exception $e) {
     $plugin->sendGIF(false);
 }

inc/StatisticsBrowscap.class.php

@@ -24,7 +24,7 @@ public function __construct() {
      * @return string
      */
     protected function _getRemoteData($url) {
-        $http = new DokuHTTPClient($url);
+        $http = new \dokuwiki\HTTP\DokuHTTPClient($url);
         $file = $http->get($url);
         if(!$file)
             throw new Exception('Your server can\'t connect to external resources. Please update the file manually.');