deepclone_hydrate: direct slot write for declared props (readonly, internal)

Author: nicolas-grekas

deepclone.c

@@ -2639,13 +2639,26 @@ PHP_FUNCTION(deepclone_hydrate)
 				Z_TRY_ADDREF_P(prop_val);
 				zend_hash_update(obj->properties, prop_name, prop_val);
 			} else {
-				zend_std_write_property(obj, prop_name, prop_val, NULL);
-				if (UNEXPECTED(EG(exception))) {
-					EG(fake_scope) = old_scope;
-					if (created) {
-						zval_ptr_dtor(&obj_zval);
+				/* Try direct property slot write first — this handles
+				 * readonly properties and avoids hook/coercion overhead.
+				 * Falls back to zend_std_write_property for dynamic
+				 * properties or properties not found in this scope. */
+				zend_property_info *pi = scope_ce
+					? zend_hash_find_ptr(&scope_ce->properties_info, prop_name)
+					: NULL;
+				if (pi && !(pi->flags & ZEND_ACC_STATIC) && pi->offset >= 0) {
+					zval *slot = OBJ_PROP(obj, pi->offset);
+					zval_ptr_dtor(slot);
+					ZVAL_COPY(slot, prop_val);
+				} else {
+					zend_std_write_property(obj, prop_name, prop_val, NULL);
+					if (UNEXPECTED(EG(exception))) {
+						EG(fake_scope) = old_scope;
+						if (created) {
+							zval_ptr_dtor(&obj_zval);
+						}
+						return;
 					}
-					return;
 				}
 			}
 		} ZEND_HASH_FOREACH_END();