Fix DatePeriod property handling with indirect modification

We do need to implement get_property_ptr_ptr to make arrays work
correctly.

Author: nikic

ext/date/php_date.c

@@ -5423,15 +5423,21 @@ static zval *date_period_write_property(zval *object, zval *member, zval *value,
 	}
 	zend_string_release(name);
 
-	std_object_handlers.write_property(object, member, value, cache_slot);
-	return value;
+	return zend_std_write_property(object, member, value, cache_slot);
 }
 /* }}} */
 
 /* {{{ date_period_get_property_ptr_ptr */
 static zval *date_period_get_property_ptr_ptr(zval *object, zval *member, int type, void **cache_slot)
 {
-	/* Fall back to read_property handler. */
-	return NULL;
+	zend_string *name = zval_get_string(member);
+	if (date_period_is_magic_property(name)) {
+		zend_throw_error(NULL, "Retrieval of DatePeriod->%s for modification is unsupported", ZSTR_VAL(name));
+		zend_string_release(name);
+		return &EG(error_zval);
+	}
+	zend_string_release(name);
+
+	return zend_std_get_property_ptr_ptr(object, member, type, cache_slot);
 }
 /* }}} */

ext/date/tests/bug65672.phpt

@@ -28,6 +28,9 @@ $period->dynamic2 = [];
 $period->dynamic2[] = "array";
 var_dump($period->dynamic2);
 
+$period->dynamic3[] = "array";
+var_dump($period->dynamic3);
+
 ?>
 --EXPECT--
 string(5) "stuff"
@@ -42,3 +45,7 @@ array(1) {
   [0]=>
   string(5) "array"
 }
+array(1) {
+  [0]=>
+  string(5) "array"
+}