php curl 获取响应头

curl_setopt($curl, CURLOPT_HEADER, 1);

        
 $data = curl_exec($curl);
         $headerSize = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
         // 根据头大小去获取头信息内容
         $header = substr($data, 0, $headerSize);
        $data=[
            'header'=>$header,
            'data'=>substr($data,$headerSize,-1),
        ];