upload multiple image to the same field

hi.
as title, I want upload multiple image to same field when create new entries using api
Is it possible?

i try this code, but only upload one image
$cfile1 = curl_file_create($file, $mime, $file_name_onserver);
$cfile2 = curl_file_create($file, $mime, $file_name_onserver);
$cfile3 = curl_file_create($file, $mime, $file_name_onserver);
$PostData = [$picField => $cfile1, $picField => $cfile2, $picField => $cfile3];
$json = Curl($Url, $ckfile, $PostData);