1--TEST-- 2It's possible to add additional optional arguments with matching signature 3--FILE-- 4<?php 5 6interface DB { 7 public function query($query, string ...$params); 8} 9 10class MySQL implements DB { 11 public function query($query, string $extraParam = null, string ...$params) { } 12} 13 14?> 15===DONE=== 16--EXPECT-- 17===DONE=== 18