-----------------------------1088570827734100011725332862
Content-Disposition: form-data; name="file"; filename="testing-upload.pdf"
Content-Type: application/x-pdf

%PDF-1.7
%âãÏÓ
1 0 obj
<</Type /Catalog
/Outlines 27 0 R
/Pages 4 0 R
>>
endobj
xì}    `Eö÷«êéIfLBHBÉÉÎpÜGÉ®$IDeð@DeYeYd]Ù¨¨è
^((xàâù~U3   QQ?÷oÿ÷êuÕ«ªW¯^WwÍLbDf ´
Kß9ññuÇló¥
M¿éå{ilØ

//PLEASE NOTE I CUT OFF MUCH OF THIS PDF FILE DATA ABOVE


-----------------------------1088570827734100011725332862
Content-Disposition: form-data; name="ProjectFile"

{
  "EffectiveOn": "2016-10-26T16:53:56.861Z",
  "ProjectId": 1582108
}
-----------------------------1088570827734100011725332862--

<?php
$filetoupload = 'C:testing-upload.pdf';
$data = array (
    "file" => array("filedata" => '@' . $filetoupload, "filename" => "testing-upload.pdf"),
    "ProjectFile" => array(
        "EffectiveOn" => "2016-10-14T16:22:38.191Z",
        "ProjectId" => "1582108",
    ));

// json encode data

$data_string = json_encode($data);

// set up the curl resource
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://api.example.com");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'password: 12345',
    'username: demouser'  ,
    'Content-Type: multipart/form-data'
));

// execute the request

$output = curl_exec($ch);

// output data

echo($output) . PHP_EOL;

// close curl resource to free up system resources
curl_close($ch);