diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index 5f7d6166f27..48c82bf7ec6 100644
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -5489,6 +5489,11 @@ static bool php_date_period_initialize_from_hash(php_period_obj *period_obj, Has
 		if (Z_TYPE_P(ht_entry) == IS_OBJECT && instanceof_function(Z_OBJCE_P(ht_entry), date_ce_interface)) {
 			php_date_obj *date_obj;
 			date_obj = Z_PHPDATE_P(ht_entry);
+
+			if (!date_obj->time) {
+				return 0;
+			}
+
 			if (period_obj->start != NULL) {
 				timelib_time_dtor(period_obj->start);
 			}
@@ -5506,6 +5511,11 @@ static bool php_date_period_initialize_from_hash(php_period_obj *period_obj, Has
 		if (Z_TYPE_P(ht_entry) == IS_OBJECT && instanceof_function(Z_OBJCE_P(ht_entry), date_ce_interface)) {
 			php_date_obj *date_obj;
 			date_obj = Z_PHPDATE_P(ht_entry);
+
+			if (!date_obj->time) {
+				return 0;
+			}
+
 			if (period_obj->end != NULL) {
 				timelib_time_dtor(period_obj->end);
 			}
@@ -5522,6 +5532,11 @@ static bool php_date_period_initialize_from_hash(php_period_obj *period_obj, Has
 		if (Z_TYPE_P(ht_entry) == IS_OBJECT && instanceof_function(Z_OBJCE_P(ht_entry), date_ce_interface)) {
 			php_date_obj *date_obj;
 			date_obj = Z_PHPDATE_P(ht_entry);
+
+			if (!date_obj->time) {
+				return 0;
+			}
+
 			if (period_obj->current != NULL) {
 				timelib_time_dtor(period_obj->current);
 			}
@@ -5538,6 +5553,11 @@ static bool php_date_period_initialize_from_hash(php_period_obj *period_obj, Has
 		if (Z_TYPE_P(ht_entry) == IS_OBJECT && Z_OBJCE_P(ht_entry) == date_ce_interval) {
 			php_interval_obj *interval_obj;
 			interval_obj = Z_PHPINTERVAL_P(ht_entry);
+
+			if (!interval_obj->initialized) {
+				return 0;
+			}
+
 			if (period_obj->interval != NULL) {
 				timelib_rel_time_dtor(period_obj->interval);
 			}
diff --git a/ext/date/tests/bug-gh11416.phpt b/ext/date/tests/bug-gh11416.phpt
index 086e16ae7f3..546867924cb 100644
--- a/ext/date/tests/bug-gh11416.phpt
+++ b/ext/date/tests/bug-gh11416.phpt
@@ -5,6 +5,7 @@ date.timezone=UTC
 --FILE--
 <?php
 $now = new DateTimeImmutable();
+$simpleInterval = new DateInterval("P2D");
 
 $date = (new ReflectionClass(DateTime::class))->newInstanceWithoutConstructor();
 try {
@@ -20,9 +21,50 @@ try {
 	echo get_class($e), ': ', $e->getMessage(), "\n";
 }
 
+$date = (new ReflectionClass(DateTime::class))->newInstanceWithoutConstructor();
+$dateperiod = (new ReflectionClass(DatePeriod::class))->newInstanceWithoutConstructor();
+$dateinterval = (new ReflectionClass(DateInterval::class))->newInstanceWithoutConstructor();
+try {
+	$dateperiod->__unserialize(['start' => $date]);
+} catch (Error $e) {
+	echo get_class($e), ': ', $e->getMessage(), "\n";
+}
+
+try {
+	$dateperiod->__unserialize(['start' => $now, 'end' => $date]);
+} catch (Error $e) {
+	echo get_class($e), ': ', $e->getMessage(), "\n";
+}
+
+try {
+	$dateperiod->__unserialize(['start' => $now, 'end' => $now, 'current' => $date]);
+} catch (Error $e) {
+	echo get_class($e), ': ', $e->getMessage(), "\n";
+}
+
+try {
+	$dateperiod->__unserialize(['start' => $now, 'end' => $now, 'current' => $now, 'interval' => $dateinterval]);
+} catch (Error $e) {
+	echo get_class($e), ': ', $e->getMessage(), "\n";
+}
+
+try {
+	$dateperiod->__unserialize([
+		'start' => $now, 'end' => $now, 'current' => $now, 'interval' => $simpleInterval,
+		'recurrences' => 2, 'include_start_date' => true, 'include_end_date' => true,
+	]);
+	echo "DatePeriod::__unserialize: SUCCESS\n";
+} catch (Error $e) {
+	echo get_class($e), ': ', $e->getMessage(), "\n";
+}
 echo "OK\n";
 ?>
 --EXPECT--
 DateObjectError: Object of type DateTimeInterface has not been correctly initialized by calling parent::__construct() in its constructor
 DateObjectError: Object of type DateTimeInterface has not been correctly initialized by calling parent::__construct() in its constructor
+Error: Invalid serialization data for DatePeriod object
+Error: Invalid serialization data for DatePeriod object
+Error: Invalid serialization data for DatePeriod object
+Error: Invalid serialization data for DatePeriod object
+DatePeriod::__unserialize: SUCCESS
 OK