BUG FIXING: E_WARNING - unserialize(): Extra data starting at offset 406 of 1042 bytes - ./engine/modules/z4m_usersessions/mod/UserSessionFile.php(78)

Author: Pascal MARTINEZ

CHANGELOG.md

@@ -1,5 +1,8 @@
 # CHANGE LOG: User sessions (z4m_usersessions)
 
+## Version 1.3, 2025-06-27
+- BUG FIXING: E_WARNING - unserialize(): Extra data starting at offset 406 of 1042 bytes - ./engine/modules/z4m_usersessions/mod/UserSessionFile.php(78)
+
 ## Version 1.2, 2025-06-15
 - CHANGE: the module's PHP constant `MOD_Z4M_USERSESSIONS_APPLICATION_URI` now accepts the 'ALL' value to display all existing user sessions in the session directory (see PHP 'session.save_path' configuration).
 - CHANGE: the value set for the module's PHP constant `MOD_Z4M_USERSESSIONS_APPLICATION_URI` is now displayed in the session configuration modal dialog.

mod/UserSessionFile.php

@@ -19,8 +19,8 @@
  * --------------------------------------------------------------------
  * ZnetDK 4 Mobile User sessions module PHP class
  *
- * File version: 1.0
- * Last update: 04/24/2025
+ * File version: 1.1
+ * Last update: 06/27/2025
  */
 
 namespace z4m_usersessions\mod;
@@ -72,10 +72,15 @@ protected function decodeSessionData() {
             throw new \Exception("Session file '{$this->filePath}' is empty.");
         }
         $decodedData = [];
-        while ($i = strpos($sessionData, '|'))
-        {
+        while ($i = strpos($sessionData, '|')) {
             $key = substr($sessionData, 0, $i);
-            $value = unserialize(substr($sessionData, 1 + $i));
+            $serializedVal = substr($sessionData, 1 + $i);
+            \ErrorHandler::suspend(); // Avoid E_WARNING - unserialize(): Extra data starting at offset...
+            $value = unserialize($serializedVal);
+            \ErrorHandler::restart();
+            if ($value === FALSE) {
+                throw new \Exception("Unserialization failed for the session file '{$this->filePath}': {$serializedVal}");
+            }
             $sessionData = substr($sessionData, 1 + $i + strlen(serialize($value)));
             $decodedData[$key] = $value;
         }

mod/config.php

@@ -18,8 +18,8 @@
  * --------------------------------------------------------------------
  * Parameters of the ZnetDK 4 Mobile User sessions module
  *
- * File version: 1.2
- * Last update: 06/15/2025
+ * File version: 1.3
+ * Last update: 07/29/2025
  */
 
 
@@ -47,9 +47,9 @@
  * Module version number
  * @return string Version
  */
-define('MOD_Z4M_USERSESSIONS_VERSION_NUMBER','1.2');
+define('MOD_Z4M_USERSESSIONS_VERSION_NUMBER','1.3');
 /**
  * Module version date
  * @return string Date in W3C format
  */
-define('MOD_Z4M_USERSESSIONS_VERSION_DATE','2025-06-15');
+define('MOD_Z4M_USERSESSIONS_VERSION_DATE','2025-07-29');