카카오페이 결제 테스트 연동 문의드립니다

안녕하세요, 며칠전 카카오로그인에 대해 질문했다가 도움을 크게 받아서 재문의 드립니다.
카카오결제 관련 문의인데요, 실 서비스 시작하기전에 사이트에 테스트로 먼저 연동,테스트를 해보고싶은데

test

<? $URL = "https://kapi.kakao.com/v1/payment/ready"; $cu = curl_init(); $post_data = array( "cid" => "TC0ONETIME", "partner_order_id" => "5234236233", "partner_user_id" => "testid", "item_name" => "초코파이" , "quantity" => "1", "total_amount" => "2200", "vat_amount" => "200", "tax_free_amount" => "0", "approval_url" => "https://com", "fail_url" => "https:///shop/product/list.php", "cancel_url" => "https:///shop/product/product_detail.php" ); curl_setopt($cu, CURLOPT_URL, $URL); curl_setopt($cu, CURLOPT_POST,true); curl_setopt($cu, CURLOPT_POSTFIELDS, http_build_query($post_data)); curl_setopt($cu, CURLOPT_RETURNTRANSFER,true); curl_setopt($cu, CURLOPT_HTTPHEADER, array("Authorization: KakaoAK ***37014a***5ccf07c07a174d4","Content-type: application/x-www-form-urlencoded;charset=utf-8")); curl_setopt($cu, CURLOPT_HEADER, false); $output = curl_exec($cu); curl_close($cu); print_r($output); ?>

이렇게 적용해서 해당 파일을 열어보면

{“tid”:“T2952530832322425069”,“tms_result”:false,“next_redirect_app_url”:“https://mockup-pg-web.kakao.com/v1/55be93b9f4fdac192ec47f944f9cf1f0477c354e386b78ff7d36f63bbd220875/aInfo",“next_redirect_mobile_url”:“https://mockup-pg-web.kakao.com/v1/55be93b9f4fdac192ec47f944f9cf1f0477c354e386b78ff7d36f63bbd220875/mInfo”,“next_redirect_pc_url”:“https://mockup-pg-web.kakao.com/v1/55be93b9f4fdac192ec47f944f9cf1f0477c354e386b78ff7d36f63bbd220875/info”,“android_app_scheme”:“kakaotalk://kakaopay/pg?url=https://mockup-pg-web.kakao.com/v1/55be93b9f4fdac192ec47f944f9cf1f0477c354e386b78ff7d36f63bbd220875/order”,“ios_app_scheme”:“kakaotalk://kakaopay/pg?url=https://mockup-pg-web.kakao.com/v1/55be93b9f4fdac192ec47f944f9cf1f0477c354e386b78ff7d36f63bbd220875/order”,“created_at”:"2021-10-13T11:27:34”}

이렇게 에러가 나옵니다,
혹시 어떻게 수정을해야 정상적인 테스트결과 화면을 볼 수 있을까요 ,?