Backported the fix for bug #53437

Author: weltling

NEWS

@@ -7,6 +7,10 @@ PHP                                                                        NEWS
   . Fixed bug #64960 (Segfault in gc_zval_possible_root). (Laruence)
   . Fixed bug #64934 (Apache2 TS crash with get_browser()). (Anatol)
 
+- DateTime
+  . Fixed bug #53437 (Crash when using unserialized DatePeriod instance).
+    (Gustavo, Derick, Anatol)
+
 - PDO_firebird:
   . Fixed bug #64037 (Firebird return wrong value for numeric field).
     (Matheus Degiovani, Matteo)