curl_setopt($curl, CURLOPT_URL, "https://" . $this->salesforce_host . "/services/oauth2/token");
        curl_setopt($curl, CURLOPT_POSTFIELDS, "client_id=" . $this->salesforce_client_id. "&grant_type=password&client_secret=" . $this->salesforce_client_secret . "&username=" . $this->salesforce_username . "&password=" . $this->salesforce_password . $this->salesforce_token);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/x-www-form-urlencoded;"));

// https://$salesforceurl/services/data/v29.0/chatter/feeds/record/$caseId/feed-items
$session = $this->getSession();
$url = $session["instanceUrl"] . "/services/data/v" . $this->salesforce_version . "/chatter/feeds/record/" . $parentId . '/feed-items';

$curl = $this->_getDefaultCurl();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");

//get file mime type and binary content of file

// form field separator
$delimiter = uniqid();
$fileFields = array(
    'fileFeedItem' => array(
        'type' => $finfo_mime,
        'content' => implode('', $buffer)
    ),
);

$data = '';

$data .= "--" . $delimiter . "rn";
$data .= 'Content-Disposition: form-data; name="json";' . "rn";
$data .= 'Content-Type: application/json; charset=UTF-8;' . "rnrn";
$fileName = basename($file);
$json = array(
    'body' => array(
        'messageSegments' => array(
            'type' => 'Text',
            'text' => 'User uploaded attachment'
        )
    ),
    'attachment' => array(
        'attachmentType' => 'NewFile',
        'title' => $fileName
    ),

);
$data .= json_encode($json)."rn";
$data .= "rnrn";


foreach ($fileFields as $name => $fileItem) {
    $data .= "--" . $delimiter . "rn";
    $data .= 'Content-Disposition: form-data; name="feedItemFileUpload"; filename="' .$fileName . '"' . "rn";
    $data .= 'Content-Type: ' . $fileItem['type'] . "rn";
    $data .= 'Content-Transfer-Encoding: binary' . "rn";
    $data .= "rn";
    $data .= $fileItem['content'] . "rn";
}
$data .= "--" . $delimiter . "--rn";

$headers = '';
$headers .= "Accept: application/xml"."rn";
$headers .= "Content-Type: multipart/form-data; boundary=".$delimiter."rn";
$headers .= "Authorization: OAuth ". $session["sessionId"] ."rn";
$headers .= "Host: ". $session["instanceUrl"] ."rn";
$headers .= "Content-Length: " . strlen($data) . "rn";
$headers .= "Expect: 100-continue" . "rn";
$headers .= "rn";

$data = $headers . $data;

curl_setopt($curl, CURLOPT_POSTFIELDS, $data);

$response_json = curl_exec($curl);

Accept: application/xml
Content-Type: multipart/form-data; boundary=52dd7f7e5fd87
Authorization: OAuth <session_id>
Host: https://cs30.salesforce.com
Content-Length: 494
Expect: 100-continue

--52dd7f7e5fd87
Content-Disposition: form-data; name="json";
Content-Type: application/json; charset=UTF-8;

{"body":{"messageSegments":{"type":"Text","text":"User uploaded attachment"}},"attachment":{"attachmentType":"NewFile","title":"attachment_test.txt"}}


--52dd7f7e5fd87
Content-Disposition: form-data; name="feedItemFileUpload"; filename="attachment_test.txt"
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: binary

�ttachment_test
--52dd7f7e5fd87--

$session = $this->myLogin();
        $url = $session["instanceUrl"] . "/services/data/v" . $this->salesforce_version . "/chatter/feeds/record/" . $parentId . '/feed-items';

        $curl = $this->_getDefaultCurl();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");

        $fileName = basename($file);
        $json = array(
            'body' => array(
                'messageSegments' => array(
                    'type' => 'Text',
                    'text' => 'User uploaded attachment'
                )
            ),
            'attachment' => array(
                'attachmentType' => 'NewFile',
                'title' => $fileName
            ),
        );

        $headers = array();
        $headers[] = "Authorization: OAuth ". $session["sessionId"];
        $headers[] = "Content-Type: application/json; charset=utf-8";
        $headers[] = "Accept: application/json";

        $fileArray = array(
            'json' =>$json,
            'feedItemFileUpload' => '@'.realpath($file),
        );

        $data = json_encode($fileArray);

        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($curl, CURLOPT_POST, true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLINFO_HEADER_OUT, true);

        $response_json = curl_exec($curl);

<?php
    $url = "https://na15.salesforce.com/services/data/v29.0/chatter/feeds/record/500i0000004AcIq/feed-items";
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");

    $fileName = basename($file);

    $headers = array();
    $headers[] = "Authorization: OAuth {token}";
    $headers[] = 'Content-Type: multipart/form-data; boundary=F9jBDELnfBLAVmLNbnLIYibT5Icp0h3VJ7mkI';

    $segments = array();
    $segments['type'] = 'Text';
    $segments['text'] = 'User uploaded attachment';

    $message = array();
    $message[] = $segments;

    $dataArray = array(
        'body' => array(
            'messageSegments' => $message
        ),
        'attachment' => array(
            'attachmentType' => 'NewFile',
            'title' => 'Test File'
        )
    );

    $data = $data.json_encode($dataArray);
    $file = realpath('phoenix-logo.png');


    $post_text = '--F9jBDELnfBLAVmLNbnLIYibT5Icp0h3VJ7mkI
Content-Disposition: form-data; name="json"
Content-Type: application/json; charset=UTF-8

{ "body":
   {
      "messageSegments" : [
      {
         "type" : "Text",
         "text" : "Here is another file for review."
      }, {
         "type" : "Hashtag",
         "tag" : "important"
      }, {
         "type" : "Text",
         "text" : "Again, please review this as soon as possible."
      }
      ]
   },
   "attachment":
   {
      "attachmentType" : "NewFile",
      "description": "Phoenix Logo",
      "title" : "Logo.png"
   }
}

--F9jBDELnfBLAVmLNbnLIYibT5Icp0h3VJ7mkI
Content-Disposition: form-data; name="feedItemFileUpload"; filename="logo.png"
Content-Type: image/png

'.file_get_contents($file).'

--F9jBDELnfBLAVmLNbnLIYibT5Icp0h3VJ7mkI--';

    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_VERBOSE, 1);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $post_text);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLINFO_HEADER_OUT, true);

    $response_json = curl_exec($curl);

    print $response_json;
    ?>