Следующий код отлично работает для меня, надеюсь, это поможет.
$username = "xxxxx";
$password = "xxxxx";
$url = "https://YourUrl/rest/api/latest/issue/YourKey/attachments";
$attachments = array("attachment1", "attachment2", "attachment3");
$curl = curl_init();
for ($i = 0; $i < count($attachments); $i++) {
$attachmentPath = "/your/attachment/path/$attachments[$i]";
$filename = array_pop(explode('/', $attachmentPath));
$cfile = new CURLFile($attachmentPath);
$cfile->setPostFilename($filename);
$data = array('file' => $cfile);
$headers = array(
'Content-Type: multipart/form-data',
'X-Atlassian-Token: nocheck'
);
curl_setopt($curl, CURLOPT_USERPWD, "$username:$password");
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($curl, CURLOPT_VERBOSE, 1);
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
$result = curl_exec($curl);
$ch_error = curl_error($curl);
if ($ch_error) {
echo "cURL Error: $ch_error";
} else {
echo $result;
}
}
curl_close($curl);