Display the readonly property modifier when printing reflection info

Author: kocsismate

ext/reflection/php_reflection.c

@@ -891,6 +891,9 @@ static void _property_string(smart_str *str, zend_property_info *prop, const cha
 		if (prop->flags & ZEND_ACC_STATIC) {
 			smart_str_appends(str, "static ");
 		}
+		if (prop->flags & ZEND_ACC_READONLY) {
+			smart_str_appends(str, "readonly ");
+		}
 		if (ZEND_TYPE_IS_SET(prop->type)) {
 			zend_string *type_str = zend_type_to_string(prop->type);
 			smart_str_append(str, type_str);

ext/reflection/tests/readonly_properties.phpt

@@ -16,9 +16,13 @@ $rp = new ReflectionProperty(Test::class, 'ro');
 var_dump($rp->isReadOnly());
 var_dump(($rp->getModifiers() & ReflectionProperty::IS_READONLY) != 0);
 
+$rp = new ReflectionProperty(Test::class, 'ro');
+echo $rp;
+
 ?>
 --EXPECT--
 bool(false)
 bool(false)
 bool(true)
 bool(true)
+Property [ public readonly int $ro ]