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--- rfc:user_defined_session_serializer [2016/11/17 21:01] – yohgaki
+++ rfc:user_defined_session_serializer [2016/11/30 05:26] – Add return value description. yohgaki
@@ Line 28: / Line 28: @@
 $serialize_func = function(array $session_data_array) {
   // User can add/encrypt data in this function
-  return serialize($session_data_array);
+  // Returning anything other than string raises E_RECOVERABLE_ERROR
+  return serialize($session_data_array); // Must return string
 }
 $unserialize_func = function(string $session_data_string) {
   // User can remove/decrypt/validate data in this function
-  return unserialize($session_data_string);
+  // Returning anything other than array raises E_RECOVERABLE_ERROR
+  return unserialize($session_data_string); // Must return array
 }
 </code>