PHP curl传 json字符串

 $ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_POSTFIELDS, $data); curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, false ); curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, false ); curl_setopt($ch, CURLOPT_HTTPHEADER, array( 'Content-Type: application/json; charset=utf-8', 'Content-Length: '.strlen($data)) 　　　　);