I hope it is helpful:
<?php
$headers = array('token: pacexpressx1x2x3j' );
$data = array(
"STATUS" => "insert" ,
"NAME" => utf8_encode("Test integration 10"),
"COD_AREA" => "4",
"DESC_AREA_" => utf8_encode("info/IT"),
"JOB" => utf8_encode("TEST job"),
"COMPANY" => "4",
"DESC_COMPANY" => utf8_encode("XPTO1"),
"file" => '@/home/user/test.png');
$url = 'your_link';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$output = curl_exec($ch);
echo($output) . PHP_EOL;
curl_close($ch);
In this example I am sending a header, and post fields.
$headers => I put a token value in a array, just to show how can you send a value.
$data => I used an array with some imaginary values.
In the curl I used this variebles here:
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
CURLOPT_POSTFIELDS -> the full data to post in a HTTP "POST" operation. To post a file, prepend a filename with @ and use the full path. The filetype can be explicitly specified by following the filename with the type in the format ';type=mimetype'. This parameter can either be passed as a urlencoded string like 'para1=val1¶2=val2&...' or as an array with the field name as key and field data as value. If the value is an array, the Content-Type header will be set to multipart/form-data. As of PHP 5.2.0, the value must be an array if files are passed to this option with the @ prefix.
If you would want to learn more about curl_setopt, I suggest you this link:
http://php.net/manual/pt_BR/function.curl-setopt.php
To see what you send and to receive the file that you send, you can use this code below:
echo 'Here is some more debugging info:';
echo "\n<hr />\n";
print_r($_FILES);
echo "\n<hr />\n";
print_r($_POST);
print "</pr" . "e>\n";
echo "\n<hr />\n";
// here you will record the file in your server... you can choose a directory if you want
file_put_contents($_FILES['file']['name'],file_get_contents($_FILES['file']['tmp_name']));