CURLOPT_POSTFIELDS

CURLOPT_POSTFIELDS is one of the accepted parameters for curl_setopt parameter #2.

CURLOPT_POSTFIELDS — The full data to post in a HTTP "POST" operation. This parameter can either be passed as a urlencoded string like para1=val1&para2=val2&... or as an array with the field name as key and field data as value. If $value is an array, the Content-Type header will be set to multipart/form-data. Files can be sent using CURLFile or CURLStringFile, in which case $value must be an array.

CURLOPT_POSTFIELDS = 10015;