diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index 96c37092511f..fc6454e1eabd 100644
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -2186,10 +2186,23 @@ static void date_interval_object_to_hash(php_interval_obj *intervalobj, HashTabl
 
 	/* Records whether this is a special relative interval that needs to be recreated from a string */
 	if (intervalobj->from_string) {
+		ZVAL_NULL(&zv); \
+		zend_hash_str_update(props, "y", sizeof("y")-1, &zv);
+		zend_hash_str_update(props, "m", sizeof("m")-1, &zv);
+		zend_hash_str_update(props, "d", sizeof("d")-1, &zv);
+		zend_hash_str_update(props, "h", sizeof("h")-1, &zv);
+		zend_hash_str_update(props, "i", sizeof("i")-1, &zv);
+		zend_hash_str_update(props, "s", sizeof("s")-1, &zv);
+		zend_hash_str_update(props, "f", sizeof("f")-1, &zv);
+		zend_hash_str_update(props, "invert", sizeof("invert")-1, &zv);
+
+		ZVAL_FALSE(&zv);
+		zend_hash_str_update(props, "days", sizeof("days")-1, &zv);
 		ZVAL_BOOL(&zv, (bool)intervalobj->from_string);
 		zend_hash_str_update(props, "from_string", strlen("from_string"), &zv);
 		ZVAL_STR_COPY(&zv, intervalobj->date_string);
 		zend_hash_str_update(props, "date_string", strlen("date_string"), &zv);
+
 		return;
 	}
 
@@ -2212,8 +2225,10 @@ static void date_interval_object_to_hash(php_interval_obj *intervalobj, HashTabl
 		ZVAL_FALSE(&zv);
 		zend_hash_str_update(props, "days", sizeof("days")-1, &zv);
 	}
-	ZVAL_BOOL(&zv, (bool)intervalobj->from_string);
+	ZVAL_FALSE(&zv);
 	zend_hash_str_update(props, "from_string", strlen("from_string"), &zv);
+	ZVAL_NULL(&zv);
+	zend_hash_str_update(props, "date_string", strlen("date_string"), &zv);
 
 #undef PHP_DATE_INTERVAL_ADD_PROPERTY
 }
@@ -4384,6 +4399,8 @@ static zval *date_interval_get_property_ptr_ptr(zend_object *object, zend_string
 		zend_string_equals_literal(name, "s") ||
 		zend_string_equals_literal(name, "f") ||
 		zend_string_equals_literal(name, "days") ||
+		zend_string_equals_literal(name, "from_string") ||
+		zend_string_equals_literal(name, "date_string") ||
 		zend_string_equals_literal(name, "invert") ) {
 		/* Fallback to read_property. */
 		ret = NULL;
diff --git a/ext/date/php_date.stub.php b/ext/date/php_date.stub.php
index e0717fa7f4c8..9f1dad617475 100644
--- a/ext/date/php_date.stub.php
+++ b/ext/date/php_date.stub.php
@@ -662,6 +662,18 @@ public static function __set_state(array $array): DateTimeZone {}
 
 class DateInterval
 {
+    public ?int $y;
+    public ?int $m;
+    public ?int $d;
+    public ?int $h;
+    public ?int $i;
+    public ?int $s;
+    public ?float $f;
+    public ?int $invert;
+    public int|false $days;
+    public bool $from_string;
+    public ?string $date_string;
+
     public function __construct(string $duration) {}
 
     /**
diff --git a/ext/date/php_date_arginfo.h b/ext/date/php_date_arginfo.h
index bbede1f39596..608c1f24af68 100644
--- a/ext/date/php_date_arginfo.h
+++ b/ext/date/php_date_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 0f204ac6646be79b515189a384fce9bcea9a4f42 */
+ * Stub hash: a02e90d2aff0b9a7bc44e15e0ba5e29726750a0e */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_strtotime, 0, 1, MAY_BE_LONG|MAY_BE_FALSE)
 	ZEND_ARG_TYPE_INFO(0, datetime, IS_STRING, 0)
@@ -1067,6 +1067,72 @@ static zend_class_entry *register_class_DateInterval(void)
 	INIT_CLASS_ENTRY(ce, "DateInterval", class_DateInterval_methods);
 	class_entry = zend_register_internal_class_ex(&ce, NULL);
 
+	zval property_y_default_value;
+	ZVAL_UNDEF(&property_y_default_value);
+	zend_string *property_y_name = zend_string_init("y", sizeof("y") - 1, 1);
+	zend_declare_typed_property(class_entry, property_y_name, &property_y_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_NULL));
+	zend_string_release(property_y_name);
+
+	zval property_m_default_value;
+	ZVAL_UNDEF(&property_m_default_value);
+	zend_string *property_m_name = zend_string_init("m", sizeof("m") - 1, 1);
+	zend_declare_typed_property(class_entry, property_m_name, &property_m_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_NULL));
+	zend_string_release(property_m_name);
+
+	zval property_d_default_value;
+	ZVAL_UNDEF(&property_d_default_value);
+	zend_string *property_d_name = zend_string_init("d", sizeof("d") - 1, 1);
+	zend_declare_typed_property(class_entry, property_d_name, &property_d_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_NULL));
+	zend_string_release(property_d_name);
+
+	zval property_h_default_value;
+	ZVAL_UNDEF(&property_h_default_value);
+	zend_string *property_h_name = zend_string_init("h", sizeof("h") - 1, 1);
+	zend_declare_typed_property(class_entry, property_h_name, &property_h_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_NULL));
+	zend_string_release(property_h_name);
+
+	zval property_i_default_value;
+	ZVAL_UNDEF(&property_i_default_value);
+	zend_string *property_i_name = zend_string_init("i", sizeof("i") - 1, 1);
+	zend_declare_typed_property(class_entry, property_i_name, &property_i_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_NULL));
+	zend_string_release(property_i_name);
+
+	zval property_s_default_value;
+	ZVAL_UNDEF(&property_s_default_value);
+	zend_string *property_s_name = zend_string_init("s", sizeof("s") - 1, 1);
+	zend_declare_typed_property(class_entry, property_s_name, &property_s_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_NULL));
+	zend_string_release(property_s_name);
+
+	zval property_f_default_value;
+	ZVAL_UNDEF(&property_f_default_value);
+	zend_string *property_f_name = zend_string_init("f", sizeof("f") - 1, 1);
+	zend_declare_typed_property(class_entry, property_f_name, &property_f_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_DOUBLE|MAY_BE_NULL));
+	zend_string_release(property_f_name);
+
+	zval property_invert_default_value;
+	ZVAL_UNDEF(&property_invert_default_value);
+	zend_string *property_invert_name = zend_string_init("invert", sizeof("invert") - 1, 1);
+	zend_declare_typed_property(class_entry, property_invert_name, &property_invert_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_NULL));
+	zend_string_release(property_invert_name);
+
+	zval property_days_default_value;
+	ZVAL_UNDEF(&property_days_default_value);
+	zend_string *property_days_name = zend_string_init("days", sizeof("days") - 1, 1);
+	zend_declare_typed_property(class_entry, property_days_name, &property_days_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_LONG|MAY_BE_FALSE));
+	zend_string_release(property_days_name);
+
+	zval property_from_string_default_value;
+	ZVAL_UNDEF(&property_from_string_default_value);
+	zend_string *property_from_string_name = zend_string_init("from_string", sizeof("from_string") - 1, 1);
+	zend_declare_typed_property(class_entry, property_from_string_name, &property_from_string_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_BOOL));
+	zend_string_release(property_from_string_name);
+
+	zval property_date_string_default_value;
+	ZVAL_UNDEF(&property_date_string_default_value);
+	zend_string *property_date_string_name = zend_string_init("date_string", sizeof("date_string") - 1, 1);
+	zend_declare_typed_property(class_entry, property_date_string_name, &property_date_string_default_value, ZEND_ACC_PUBLIC, NULL, (zend_type) ZEND_TYPE_INIT_MASK(MAY_BE_STRING|MAY_BE_NULL));
+	zend_string_release(property_date_string_name);
+
 	return class_entry;
 }
 
diff --git a/ext/date/tests/DateInterval_serialize-001.phpt b/ext/date/tests/DateInterval_serialize-001.phpt
index cad33185cf9b..12a14d86f21f 100644
--- a/ext/date/tests/DateInterval_serialize-001.phpt
+++ b/ext/date/tests/DateInterval_serialize-001.phpt
@@ -26,7 +26,7 @@ var_dump($now->sub($e));
 ?>
 --EXPECTF--
 Original object:
-object(DateInterval)#1 (10) {
+object(DateInterval)#1 (11) {
   ["y"]=>
   int(2)
   ["m"]=>
@@ -47,15 +47,17 @@ object(DateInterval)#1 (10) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 
 
 Serialised object:
-string(164) "O:12:"DateInterval":10:{s:1:"y";i:2;s:1:"m";i:0;s:1:"d";i:4;s:1:"h";i:6;s:1:"i";i:8;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;}"
+string(185) "O:12:"DateInterval":11:{s:1:"y";i:2;s:1:"m";i:0;s:1:"d";i:4;s:1:"h";i:6;s:1:"i";i:8;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:11:"date_string";N;}"
 
 
 Unserialised object:
-object(DateInterval)#2 (10) {
+object(DateInterval)#2 (11) {
   ["y"]=>
   int(2)
   ["m"]=>
@@ -76,6 +78,8 @@ object(DateInterval)#2 (10) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 
 
@@ -101,6 +105,8 @@ array(%d) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 
 
diff --git a/ext/date/tests/DateInterval_serialize-002.phpt b/ext/date/tests/DateInterval_serialize-002.phpt
index d21e02245e69..d8bfbf410705 100644
--- a/ext/date/tests/DateInterval_serialize-002.phpt
+++ b/ext/date/tests/DateInterval_serialize-002.phpt
@@ -45,7 +45,7 @@ var_dump($now->sub($e));
 ?>
 --EXPECTF--
 Original object:
-object(DateInterval)#3 (10) {
+object(DateInterval)#3 (11) {
   ["y"]=>
   int(43)
   ["m"]=>
@@ -66,15 +66,17 @@ object(DateInterval)#3 (10) {
   int(15820)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 
 
 Serialised object:
-string(172) "O:12:"DateInterval":10:{s:1:"y";i:43;s:1:"m";i:3;s:1:"d";i:24;s:1:"h";i:1;s:1:"i";i:12;s:1:"s";i:27;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";i:15820;s:11:"from_string";b:0;}"
+string(193) "O:12:"DateInterval":11:{s:1:"y";i:43;s:1:"m";i:3;s:1:"d";i:24;s:1:"h";i:1;s:1:"i";i:12;s:1:"s";i:27;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";i:15820;s:11:"from_string";b:0;s:11:"date_string";N;}"
 
 
 Unserialised object:
-object(DateInterval)#4 (10) {
+object(DateInterval)#4 (11) {
   ["y"]=>
   int(43)
   ["m"]=>
@@ -95,6 +97,8 @@ object(DateInterval)#4 (10) {
   int(15820)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 
 
@@ -120,11 +124,13 @@ array(%d) {
   int(15820)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 
 
 Calling __unserialize manually:
-object(DateInterval)#5 (10) {
+object(DateInterval)#5 (11) {
   ["y"]=>
   int(43)
   ["m"]=>
@@ -145,6 +151,8 @@ object(DateInterval)#5 (10) {
   int(15820)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 
 
diff --git a/ext/date/tests/DateInterval_serialize-003.phpt b/ext/date/tests/DateInterval_serialize-003.phpt
index cc1d9a371bb0..2ddc01a0809d 100644
--- a/ext/date/tests/DateInterval_serialize-003.phpt
+++ b/ext/date/tests/DateInterval_serialize-003.phpt
@@ -41,6 +41,24 @@ try {
 --EXPECTF--
 Original object:
 object(DateInterval)#1 (%d) {
+  ["y"]=>
+  NULL
+  ["m"]=>
+  NULL
+  ["d"]=>
+  NULL
+  ["h"]=>
+  NULL
+  ["i"]=>
+  NULL
+  ["s"]=>
+  NULL
+  ["f"]=>
+  NULL
+  ["invert"]=>
+  NULL
+  ["days"]=>
+  bool(false)
   ["from_string"]=>
   bool(true)
   ["date_string"]=>
@@ -49,11 +67,29 @@ object(DateInterval)#1 (%d) {
 
 
 Serialised object:
-string(%d) "O:12:"DateInterval":2:{s:11:"from_string";b:1;s:11:"date_string";s:%d:"next weekday";}"
+string(187) "O:12:"DateInterval":11:{s:1:"y";N;s:1:"m";N;s:1:"d";N;s:1:"h";N;s:1:"i";N;s:1:"s";N;s:1:"f";N;s:6:"invert";N;s:4:"days";b:0;s:11:"from_string";b:1;s:11:"date_string";s:12:"next weekday";}"
 
 
 Unserialised object:
-object(DateInterval)#2 (2) {
+object(DateInterval)#2 (11) {
+  ["y"]=>
+  NULL
+  ["m"]=>
+  NULL
+  ["d"]=>
+  NULL
+  ["h"]=>
+  NULL
+  ["i"]=>
+  NULL
+  ["s"]=>
+  NULL
+  ["f"]=>
+  NULL
+  ["invert"]=>
+  NULL
+  ["days"]=>
+  bool(false)
   ["from_string"]=>
   bool(true)
   ["date_string"]=>
@@ -62,7 +98,25 @@ object(DateInterval)#2 (2) {
 
 
 Calling __serialize manually:
-array(2) {
+array(11) {
+  ["y"]=>
+  NULL
+  ["m"]=>
+  NULL
+  ["d"]=>
+  NULL
+  ["h"]=>
+  NULL
+  ["i"]=>
+  NULL
+  ["s"]=>
+  NULL
+  ["f"]=>
+  NULL
+  ["invert"]=>
+  NULL
+  ["days"]=>
+  bool(false)
   ["from_string"]=>
   bool(true)
   ["date_string"]=>
@@ -71,7 +125,25 @@ array(2) {
 
 
 Calling __unserialize manually:
-object(DateInterval)#3 (2) {
+object(DateInterval)#3 (11) {
+  ["y"]=>
+  NULL
+  ["m"]=>
+  NULL
+  ["d"]=>
+  NULL
+  ["h"]=>
+  NULL
+  ["i"]=>
+  NULL
+  ["s"]=>
+  NULL
+  ["f"]=>
+  NULL
+  ["invert"]=>
+  NULL
+  ["days"]=>
+  bool(false)
   ["from_string"]=>
   bool(true)
   ["date_string"]=>
diff --git a/ext/date/tests/DatePeriod_createFromISO8601String_static_return.phpt b/ext/date/tests/DatePeriod_createFromISO8601String_static_return.phpt
index f8b1e1cffe43..568ed5b64858 100644
--- a/ext/date/tests/DatePeriod_createFromISO8601String_static_return.phpt
+++ b/ext/date/tests/DatePeriod_createFromISO8601String_static_return.phpt
@@ -36,7 +36,7 @@ object(MyDatePeriod)#1 (7) {
   ["end"]=>
   NULL
   ["interval"]=>
-  object(DateInterval)#3 (10) {
+  object(DateInterval)#3 (11) {
     ["y"]=>
     int(0)
     ["m"]=>
@@ -57,6 +57,8 @@ object(MyDatePeriod)#1 (7) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(5)
diff --git a/ext/date/tests/DatePeriod_serialize-001.phpt b/ext/date/tests/DatePeriod_serialize-001.phpt
index c30a4eb0ef13..6c166dded1b8 100644
--- a/ext/date/tests/DatePeriod_serialize-001.phpt
+++ b/ext/date/tests/DatePeriod_serialize-001.phpt
@@ -58,6 +58,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(5)
@@ -69,7 +71,7 @@ object(DatePeriod)#%d (%d) {
 
 
 Serialised object:
-string(%d) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2012-07-01 00:00:00.000000";s:13:"timezone_type";i:1;s:8:"timezone";s:6:"+00:00";}s:7:"current";N;s:3:"end";N;s:8:"interval";O:12:"DateInterval":10:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:7;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;}s:11:"recurrences";i:5;s:18:"include_start_date";b:1;s:16:"include_end_date";b:0;}"
+string(470) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2012-07-01 00:00:00.000000";s:13:"timezone_type";i:1;s:8:"timezone";s:6:"+00:00";}s:7:"current";N;s:3:"end";N;s:8:"interval";O:12:"DateInterval":11:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:7;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:11:"date_string";N;}s:11:"recurrences";i:5;s:18:"include_start_date";b:1;s:16:"include_end_date";b:0;}"
 
 
 Unserialised object:
@@ -109,6 +111,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(5)
@@ -156,6 +160,8 @@ array(%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(5)
diff --git a/ext/date/tests/DatePeriod_serialize-002.phpt b/ext/date/tests/DatePeriod_serialize-002.phpt
index d87bcd9a866d..bf48937f5500 100644
--- a/ext/date/tests/DatePeriod_serialize-002.phpt
+++ b/ext/date/tests/DatePeriod_serialize-002.phpt
@@ -73,6 +73,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(1)
@@ -84,7 +86,7 @@ object(DatePeriod)#%d (%d) {
 
 
 Serialised object:
-string(%d) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1978-12-22 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";N;s:3:"end";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2022-04-29 15:51:56.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:13:"Europe/London";}s:8:"interval";O:12:"DateInterval":10:{s:1:"y";i:2;s:1:"m";i:6;s:1:"d";i:0;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;}s:11:"recurrences";i:1;s:18:"include_start_date";b:1;s:16:"include_end_date";b:0;}"
+string(614) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1978-12-22 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";N;s:3:"end";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2022-04-29 15:51:56.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:13:"Europe/London";}s:8:"interval";O:12:"DateInterval":11:{s:1:"y";i:2;s:1:"m";i:6;s:1:"d";i:0;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:11:"date_string";N;}s:11:"recurrences";i:1;s:18:"include_start_date";b:1;s:16:"include_end_date";b:0;}"
 
 
 Unserialised object:
@@ -131,6 +133,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(1)
@@ -185,6 +189,8 @@ array(%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(1)
diff --git a/ext/date/tests/DatePeriod_serialize-003.phpt b/ext/date/tests/DatePeriod_serialize-003.phpt
index af52e5642b41..d09621c3e79f 100644
--- a/ext/date/tests/DatePeriod_serialize-003.phpt
+++ b/ext/date/tests/DatePeriod_serialize-003.phpt
@@ -73,6 +73,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(0)
@@ -84,7 +86,7 @@ object(DatePeriod)#%d (%d) {
 
 
 Serialised object:
-string(%d) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1978-12-22 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";N;s:3:"end";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2022-04-29 15:51:56.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:13:"Europe/London";}s:8:"interval";O:12:"DateInterval":10:{s:1:"y";i:2;s:1:"m";i:6;s:1:"d";i:0;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;}s:11:"recurrences";i:0;s:18:"include_start_date";b:0;s:16:"include_end_date";b:0;}"
+string(614) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1978-12-22 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";N;s:3:"end";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2022-04-29 15:51:56.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:13:"Europe/London";}s:8:"interval";O:12:"DateInterval":11:{s:1:"y";i:2;s:1:"m";i:6;s:1:"d";i:0;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:11:"date_string";N;}s:11:"recurrences";i:0;s:18:"include_start_date";b:0;s:16:"include_end_date";b:0;}"
 
 
 Unserialised object:
@@ -131,6 +133,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(0)
@@ -185,6 +189,8 @@ array(%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(0)
diff --git a/ext/date/tests/DatePeriod_serialize-004.phpt b/ext/date/tests/DatePeriod_serialize-004.phpt
index f3e8b1156e9b..2b08644f3640 100644
--- a/ext/date/tests/DatePeriod_serialize-004.phpt
+++ b/ext/date/tests/DatePeriod_serialize-004.phpt
@@ -71,6 +71,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(7)
@@ -92,7 +94,7 @@ Iterate of object:
 
 
 Serialised object:
-string(%d) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1978-12-22 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1979-08-06 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:3:"end";N;s:8:"interval";O:12:"DateInterval":10:{s:1:"y";i:0;s:1:"m";i:1;s:1:"d";i:0;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;}s:11:"recurrences";i:7;s:18:"include_start_date";b:0;s:16:"include_end_date";b:0;}"
+string(617) "O:10:"DatePeriod":7:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1978-12-22 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"1979-08-06 09:15:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:3:"end";N;s:8:"interval";O:12:"DateInterval":11:{s:1:"y";i:0;s:1:"m";i:1;s:1:"d";i:0;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:11:"date_string";N;}s:11:"recurrences";i:7;s:18:"include_start_date";b:0;s:16:"include_end_date";b:0;}"
 
 
 Unserialised object:
@@ -139,6 +141,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(7)
@@ -193,6 +197,8 @@ array(%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(7)
diff --git a/ext/date/tests/DatePeriod_set_state.phpt b/ext/date/tests/DatePeriod_set_state.phpt
index b7d537e98570..ebefd1574932 100644
--- a/ext/date/tests/DatePeriod_set_state.phpt
+++ b/ext/date/tests/DatePeriod_set_state.phpt
@@ -55,6 +55,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(25)
diff --git a/ext/date/tests/bug45682.phpt b/ext/date/tests/bug45682.phpt
index 84178aadb844..bb8550cc3f99 100644
--- a/ext/date/tests/bug45682.phpt
+++ b/ext/date/tests/bug45682.phpt
@@ -34,4 +34,6 @@ object(DateInterval)#%d (%d) {
   int(3)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug48678.phpt b/ext/date/tests/bug48678.phpt
index 3934b187e709..5472271dc2c0 100644
--- a/ext/date/tests/bug48678.phpt
+++ b/ext/date/tests/bug48678.phpt
@@ -20,6 +20,7 @@ DateInterval Object
     [invert] => 0
     [days] => 
     [from_string] => 
+    [date_string] => 
 )
 DateInterval Object
 (
@@ -33,4 +34,5 @@ DateInterval Object
     [invert] => 0
     [days] => 
     [from_string] => 
+    [date_string] => 
 )
diff --git a/ext/date/tests/bug49081.phpt b/ext/date/tests/bug49081.phpt
index 6f98041e8f74..7733c65cf9bc 100644
--- a/ext/date/tests/bug49081.phpt
+++ b/ext/date/tests/bug49081.phpt
@@ -21,4 +21,5 @@ DateInterval Object
     [invert] => 0
     [days] => 30
     [from_string] => 
+    [date_string] => 
 )
diff --git a/ext/date/tests/bug49778.phpt b/ext/date/tests/bug49778.phpt
index d4e1a2c0ace0..cfc9a735f950 100644
--- a/ext/date/tests/bug49778.phpt
+++ b/ext/date/tests/bug49778.phpt
@@ -29,6 +29,8 @@ object(DateInterval)#%d (%d) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 7
 (unknown)
diff --git a/ext/date/tests/bug52113.phpt b/ext/date/tests/bug52113.phpt
index 74c8157fcad4..7dd724a27407 100644
--- a/ext/date/tests/bug52113.phpt
+++ b/ext/date/tests/bug52113.phpt
@@ -54,8 +54,10 @@ object(DateInterval)#%d (%d) {
   int(0)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
-string(164) "O:12:"DateInterval":10:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:0;s:1:"h";i:4;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";i:0;s:11:"from_string";b:0;}"
+string(185) "O:12:"DateInterval":11:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:0;s:1:"h";i:4;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";i:0;s:11:"from_string";b:0;s:11:"date_string";N;}"
 \DateInterval::__set_state(array(
    'y' => 0,
    'm' => 0,
@@ -67,6 +69,7 @@ string(164) "O:12:"DateInterval":10:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:0;s:1:"h"
    'invert' => 0,
    'days' => 0,
    'from_string' => false,
+   'date_string' => NULL,
 ))object(DateInterval)#%d (%d) {
   ["y"]=>
   int(0)
@@ -88,6 +91,8 @@ string(164) "O:12:"DateInterval":10:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:0;s:1:"h"
   int(0)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 object(DatePeriod)#%d (%d) {
   ["start"]=>
@@ -125,6 +130,8 @@ object(DatePeriod)#%d (%d) {
     int(0)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(3)
@@ -154,6 +161,8 @@ object(DateInterval)#%d (%d) {
   int(2400)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 object(DatePeriod)#%d (%d) {
   ["start"]=>
@@ -191,6 +200,8 @@ object(DatePeriod)#%d (%d) {
     int(0)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(3)
diff --git a/ext/date/tests/bug52738.phpt b/ext/date/tests/bug52738.phpt
index e0f3a1ef5c84..781fded888a6 100644
--- a/ext/date/tests/bug52738.phpt
+++ b/ext/date/tests/bug52738.phpt
@@ -21,7 +21,6 @@ print_r($I);
 42
 di Object
 (
-    [unit] => 42
     [y] => 0
     [m] => 0
     [d] => 11
@@ -32,4 +31,6 @@ di Object
     [invert] => 0
     [days] => 
     [from_string] => 
+    [date_string] => 
+    [unit] => 42
 )
diff --git a/ext/date/tests/bug52808.phpt b/ext/date/tests/bug52808.phpt
index 45568c754458..aa436f895487 100644
--- a/ext/date/tests/bug52808.phpt
+++ b/ext/date/tests/bug52808.phpt
@@ -48,6 +48,8 @@ object(DateInterval)#%d (%d) {
   int(437)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 object(DateInterval)#%d (%d) {
   ["y"]=>
@@ -70,6 +72,8 @@ object(DateInterval)#%d (%d) {
   int(294)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 object(DateInterval)#%d (%d) {
   ["y"]=>
@@ -92,6 +96,8 @@ object(DateInterval)#%d (%d) {
   int(294)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 DateMalformedIntervalStringException: Failed to parse interval (2007-05-11T15:30:00Z/)
 DateMalformedIntervalStringException: Failed to parse interval (2007-05-11T15:30:00Z)
diff --git a/ext/date/tests/bug53437_var0.phpt b/ext/date/tests/bug53437_var0.phpt
index 9ae257a61b0f..96b1a7c51b49 100644
--- a/ext/date/tests/bug53437_var0.phpt
+++ b/ext/date/tests/bug53437_var0.phpt
@@ -71,6 +71,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(3)
@@ -122,6 +124,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(3)
diff --git a/ext/date/tests/bug53437_var2.phpt b/ext/date/tests/bug53437_var2.phpt
index 9ca6a0f6b276..5691729af645 100644
--- a/ext/date/tests/bug53437_var2.phpt
+++ b/ext/date/tests/bug53437_var2.phpt
@@ -33,6 +33,8 @@ object(DateInterval)#1 (%d) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 object(DateInterval)#2 (%d) {
   ["y"]=>
@@ -55,4 +57,6 @@ object(DateInterval)#2 (%d) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug53437_var4.phpt b/ext/date/tests/bug53437_var4.phpt
index 14823fb4ba47..0cb2ef11a661 100644
--- a/ext/date/tests/bug53437_var4.phpt
+++ b/ext/date/tests/bug53437_var4.phpt
@@ -42,6 +42,8 @@ object(DateInterval)#%d (%d) {
   int(2)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 int(0)
 int(0)
diff --git a/ext/date/tests/bug53437_var5.phpt b/ext/date/tests/bug53437_var5.phpt
index 77d117bca691..41873ad5338f 100644
--- a/ext/date/tests/bug53437_var5.phpt
+++ b/ext/date/tests/bug53437_var5.phpt
@@ -32,4 +32,6 @@ object(DateInterval)#%d (%d) {
   int(0)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug53437_var6.phpt b/ext/date/tests/bug53437_var6.phpt
index cfc60e6c1ca0..59fba5eb4ba7 100644
--- a/ext/date/tests/bug53437_var6.phpt
+++ b/ext/date/tests/bug53437_var6.phpt
@@ -32,4 +32,6 @@ object(DateInterval)#%d (%d) {
   int(0)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug60774.phpt b/ext/date/tests/bug60774.phpt
index 2f3de6bafd14..477dc3d4696d 100644
--- a/ext/date/tests/bug60774.phpt
+++ b/ext/date/tests/bug60774.phpt
@@ -9,6 +9,24 @@ echo $i->format("%a"), "\n";
 ?>
 --EXPECTF--
 object(DateInterval)#1 (%d) {
+  ["y"]=>
+  NULL
+  ["m"]=>
+  NULL
+  ["d"]=>
+  NULL
+  ["h"]=>
+  NULL
+  ["i"]=>
+  NULL
+  ["s"]=>
+  NULL
+  ["f"]=>
+  NULL
+  ["invert"]=>
+  NULL
+  ["days"]=>
+  bool(false)
   ["from_string"]=>
   bool(true)
   ["date_string"]=>
diff --git a/ext/date/tests/bug66545.phpt b/ext/date/tests/bug66545.phpt
index 0d2f33757069..d5f7dad906ed 100644
--- a/ext/date/tests/bug66545.phpt
+++ b/ext/date/tests/bug66545.phpt
@@ -28,4 +28,5 @@ DateInterval Object
     [invert] => 0
     [days] => 14
     [from_string] => 
+    [date_string] => 
 )
diff --git a/ext/date/tests/bug70153.phpt b/ext/date/tests/bug70153.phpt
index 9aaa0e7d538f..58602c8da515 100644
--- a/ext/date/tests/bug70153.phpt
+++ b/ext/date/tests/bug70153.phpt
@@ -18,12 +18,30 @@ var_dump($i1->days, $i2->days);
 --EXPECT--
 DateInterval Object
 (
+    [y] => 
+    [m] => 
+    [d] => 
+    [h] => 
+    [i] => 
+    [s] => 
+    [f] => 
+    [invert] => 
+    [days] => 
     [from_string] => 1
     [date_string] => +1 month
 )
-O:12:"DateInterval":2:{s:11:"from_string";b:1;s:11:"date_string";s:8:"+1 month";}
+O:12:"DateInterval":11:{s:1:"y";N;s:1:"m";N;s:1:"d";N;s:1:"h";N;s:1:"i";N;s:1:"s";N;s:1:"f";N;s:6:"invert";N;s:4:"days";b:0;s:11:"from_string";b:1;s:11:"date_string";s:8:"+1 month";}
 DateInterval Object
 (
+    [y] => 
+    [m] => 
+    [d] => 
+    [h] => 
+    [i] => 
+    [s] => 
+    [f] => 
+    [invert] => 
+    [days] => 
     [from_string] => 1
     [date_string] => +1 month
 )
diff --git a/ext/date/tests/bug71700.phpt b/ext/date/tests/bug71700.phpt
index 09f6e76058c5..fd13cd94c041 100644
--- a/ext/date/tests/bug71700.phpt
+++ b/ext/date/tests/bug71700.phpt
@@ -33,4 +33,6 @@ object(DateInterval)#3 (%d) {
   int(30)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug73091.phpt b/ext/date/tests/bug73091.phpt
index 440f2bbca60d..3d8ede3725ed 100644
--- a/ext/date/tests/bug73091.phpt
+++ b/ext/date/tests/bug73091.phpt
@@ -33,4 +33,6 @@ object(DateInterval)#%d (%d) {
   int(-1)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug74274.phpt b/ext/date/tests/bug74274.phpt
index 20387419728d..84d71130fa51 100644
--- a/ext/date/tests/bug74274.phpt
+++ b/ext/date/tests/bug74274.phpt
@@ -21,4 +21,5 @@ DateInterval Object
     [invert] => 0
     [days] => 1
     [from_string] => 
+    [date_string] => 
 )
diff --git a/ext/date/tests/bug74524.phpt b/ext/date/tests/bug74524.phpt
index 825fb0be8b30..5f105268a343 100644
--- a/ext/date/tests/bug74524.phpt
+++ b/ext/date/tests/bug74524.phpt
@@ -23,4 +23,5 @@ DateInterval Object
     [invert] => 1
     [days] => 227
     [from_string] => 
+    [date_string] => 
 )
diff --git a/ext/date/tests/bug77571.phpt b/ext/date/tests/bug77571.phpt
index 84790e0cd67b..84826f760cf4 100644
--- a/ext/date/tests/bug77571.phpt
+++ b/ext/date/tests/bug77571.phpt
@@ -24,4 +24,5 @@ DateInterval Object
     [invert] => 0
     [days] => 35
     [from_string] => 
+    [date_string] => 
 )
diff --git a/ext/date/tests/bug78452.phpt b/ext/date/tests/bug78452.phpt
index ba6936551168..c3a979c1b63a 100644
--- a/ext/date/tests/bug78452.phpt
+++ b/ext/date/tests/bug78452.phpt
@@ -29,4 +29,6 @@ object(DateInterval)#3 (%d) {
   int(33)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug79015.phpt b/ext/date/tests/bug79015.phpt
index 99cb03f75d5c..d0707ff21802 100644
--- a/ext/date/tests/bug79015.phpt
+++ b/ext/date/tests/bug79015.phpt
@@ -27,4 +27,6 @@ object(DateInterval)#%d (%d) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/bug81263.phpt b/ext/date/tests/bug81263.phpt
index afeba1ebbb1a..00256690c7bd 100644
--- a/ext/date/tests/bug81263.phpt
+++ b/ext/date/tests/bug81263.phpt
@@ -9,7 +9,7 @@ $dt2 = new DateTimeImmutable('2020-07-19 16:30:00', new DateTimeZone('UTC'));
 print_r($dt2->diff($dt1));
 print_r($dt1->diff($dt2));
 ?>
---EXPECTF--
+--EXPECT--
 DateInterval Object
 (
     [y] => 0
@@ -22,6 +22,7 @@ DateInterval Object
     [invert] => 0
     [days] => 0
     [from_string] => 
+    [date_string] => 
 )
 DateInterval Object
 (
@@ -35,4 +36,5 @@ DateInterval Object
     [invert] => 0
     [days] => 0
     [from_string] => 
+    [date_string] => 
 )
diff --git a/ext/date/tests/date_diff1.phpt b/ext/date/tests/date_diff1.phpt
index fa2c64ddd59d..5f2111f8f9c4 100644
--- a/ext/date/tests/date_diff1.phpt
+++ b/ext/date/tests/date_diff1.phpt
@@ -49,4 +49,6 @@ object(DateInterval)#%d (%d) {
   int(33)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
diff --git a/ext/date/tests/date_period_set_state1.phpt b/ext/date/tests/date_period_set_state1.phpt
index b3824cee4e8d..2a4eebc18349 100644
--- a/ext/date/tests/date_period_set_state1.phpt
+++ b/ext/date/tests/date_period_set_state1.phpt
@@ -62,6 +62,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(2)
diff --git a/ext/date/tests/date_period_unserialize1.phpt b/ext/date/tests/date_period_unserialize1.phpt
index 9ab7dd514859..1e7569db95f1 100644
--- a/ext/date/tests/date_period_unserialize1.phpt
+++ b/ext/date/tests/date_period_unserialize1.phpt
@@ -67,6 +67,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(2)
diff --git a/ext/date/tests/date_period_unserialize3.phpt b/ext/date/tests/date_period_unserialize3.phpt
index d5d4a57456d9..2d0612c803dc 100644
--- a/ext/date/tests/date_period_unserialize3.phpt
+++ b/ext/date/tests/date_period_unserialize3.phpt
@@ -72,6 +72,8 @@ object(DatePeriod)#%d (%d) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(1)
diff --git a/ext/date/tests/date_time_fractions.phpt b/ext/date/tests/date_time_fractions.phpt
index 4536e0f2eb21..10681db1e9eb 100644
--- a/ext/date/tests/date_time_fractions.phpt
+++ b/ext/date/tests/date_time_fractions.phpt
@@ -79,6 +79,8 @@ object(DateInterval)#%d (%d) {
   int(0)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
 }
 2016-10-03 13:20:06.724934
 2016-10-03 13:20:07.103123
diff --git a/ext/date/tests/gh10747-3.phpt b/ext/date/tests/gh10747-3.phpt
index ea37c26eb249..60f059c49728 100644
--- a/ext/date/tests/gh10747-3.phpt
+++ b/ext/date/tests/gh10747-3.phpt
@@ -23,16 +23,8 @@ $u = unserialize($s);
 
 var_dump($i, str_replace(chr(0), '!', $s), $u);
 ?>
---EXPECTF--
-object(I)#1 (14) {
-  ["var1":"I":private]=>
-  int(1)
-  ["var2":"I":private]=>
-  int(2)
-  ["var3":protected]=>
-  int(3)
-  ["var4":protected]=>
-  int(4)
+--EXPECT--
+object(I)#1 (15) {
   ["y"]=>
   int(0)
   ["m"]=>
@@ -53,9 +45,8 @@ object(I)#1 (14) {
   bool(false)
   ["from_string"]=>
   bool(false)
-}
-string(224) "O:1:"I":14:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:3;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:7:"!I!var1";i:1;s:7:"!I!var2";i:2;s:7:"!*!var3";i:3;s:7:"!*!var4";i:4;}"
-object(I)#2 (14) {
+  ["date_string"]=>
+  NULL
   ["var1":"I":private]=>
   int(1)
   ["var2":"I":private]=>
@@ -64,6 +55,9 @@ object(I)#2 (14) {
   int(3)
   ["var4":protected]=>
   int(4)
+}
+string(245) "O:1:"I":15:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:3;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:11:"date_string";N;s:7:"!I!var1";i:1;s:7:"!I!var2";i:2;s:7:"!*!var3";i:3;s:7:"!*!var4";i:4;}"
+object(I)#2 (15) {
   ["y"]=>
   int(0)
   ["m"]=>
@@ -84,4 +78,14 @@ object(I)#2 (14) {
   bool(false)
   ["from_string"]=>
   bool(false)
+  ["date_string"]=>
+  NULL
+  ["var1":"I":private]=>
+  int(1)
+  ["var2":"I":private]=>
+  int(2)
+  ["var3":protected]=>
+  int(3)
+  ["var4":protected]=>
+  int(4)
 }
diff --git a/ext/date/tests/gh10747-4.phpt b/ext/date/tests/gh10747-4.phpt
index 9933902a498d..8edb7f8bde44 100644
--- a/ext/date/tests/gh10747-4.phpt
+++ b/ext/date/tests/gh10747-4.phpt
@@ -25,7 +25,7 @@ $u = unserialize($s);
 
 var_dump($i, str_replace(chr(0), '!', $s), $u);
 ?>
---EXPECTF--
+--EXPECT--
 object(I)#1 (11) {
   ["start"]=>
   object(DateTimeImmutable)#5 (3) {
@@ -48,7 +48,7 @@ object(I)#1 (11) {
     string(3) "UTC"
   }
   ["interval"]=>
-  object(DateInterval)#7 (10) {
+  object(DateInterval)#7 (11) {
     ["y"]=>
     int(0)
     ["m"]=>
@@ -69,6 +69,8 @@ object(I)#1 (11) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(1)
@@ -85,7 +87,7 @@ object(I)#1 (11) {
   ["var4":protected]=>
   int(4)
 }
-string(631) "O:1:"I":11:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2023-03-03 16:24:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:7:"current";N;s:3:"end";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2023-03-09 16:24:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"interval";O:12:"DateInterval":10:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:0;s:1:"h";i:1;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;}s:11:"recurrences";i:1;s:18:"include_start_date";b:1;s:16:"include_end_date";b:0;s:7:"!I!var1";i:1;s:7:"!I!var2";i:2;s:7:"!*!var3";i:3;s:7:"!*!var4";i:4;}"
+string(652) "O:1:"I":11:{s:5:"start";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2023-03-03 16:24:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:7:"current";N;s:3:"end";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2023-03-09 16:24:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"interval";O:12:"DateInterval":11:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:0;s:1:"h";i:1;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;s:11:"date_string";N;}s:11:"recurrences";i:1;s:18:"include_start_date";b:1;s:16:"include_end_date";b:0;s:7:"!I!var1";i:1;s:7:"!I!var2";i:2;s:7:"!*!var3";i:3;s:7:"!*!var4";i:4;}"
 object(I)#2 (11) {
   ["start"]=>
   object(DateTimeImmutable)#9 (3) {
@@ -108,7 +110,7 @@ object(I)#2 (11) {
     string(3) "UTC"
   }
   ["interval"]=>
-  object(DateInterval)#11 (10) {
+  object(DateInterval)#11 (11) {
     ["y"]=>
     int(0)
     ["m"]=>
@@ -129,6 +131,8 @@ object(I)#2 (11) {
     bool(false)
     ["from_string"]=>
     bool(false)
+    ["date_string"]=>
+    NULL
   }
   ["recurrences"]=>
   int(1)
diff --git a/ext/date/tests/gh8730.phpt b/ext/date/tests/gh8730.phpt
index 2992652ec0e6..b9b6beef9b79 100644
--- a/ext/date/tests/gh8730.phpt
+++ b/ext/date/tests/gh8730.phpt
@@ -19,4 +19,5 @@ DateInterval Object
     [invert] => 0
     [days] => 0
     [from_string] => 
+    [date_string] => 
 )