Online PHP editor | refs for HkKVC

<?php var_dump(preg_match("//u", "\xE38182", $matches)); var_dump($matches); var_dump(preg_match("//u", "\xE4B880", $matches)); var_dump($matches); var_dump(preg_match("//u", "\0xF0A0808B", $matches)); var_dump($matches); var_dump(preg_match("//u", "𠀋", $matches)); var_dump($matches); var_dump("\xF0A0808B" == "𠀋");