how to send multipart request using php - php

Question

I am uploading image on my signup page which is submitted by ajax and is send to ajaxcall.php where i add some headers to the request and send it to the register api which register the user
issue : i am receiving the $_POST and $_FILE in ajaxcall.php but on sending the curl request with the same parameters and few headers are added i do not recieve the post params on the server side
Below is the code for creating content deposition
function genereatePostFileVars($file,$rem=array(),$boundary)
{
$postvar="";
foreach($_POST as $key=>$val)
{
if($key!='endpoint')
{
if(!in_array($key,$rem))
{
if($key != 'uname')
{
$postvar.="\r\n$boundary\r\nContent-Disposition: form-data; name=\"$key\"\r\n\r\n$val";
}
else
{
$postvar.="\r\n$boundary\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n$val";
}
}
}
}
if(!empty($_FILES))
{
$filedata=array();
if(count($_FILES[$file]['name'])>1)
{
for($i=0;$i<count($_FILES[$file]['name']);$i++)
{
$fst='file'.($i+1);
$filedata[$fst]['name']=$_FILES[$file]['name'][$i];
$filedata[$fst]['error']=$_FILES[$file]['error'][$i];
$filedata[$fst]['tmp_name']=$_FILES[$file]['tmp_name'][$i];
$filedata[$fst]['size']=$_FILES[$file]['size'][$i];
}
}
else{
$filedata['file']=$_FILES[$file];
;
}
foreach($filedata as $name=>$value){
$postvar.="\r\n".$boundary."\r\nContent-Disposition: form-data; name=\"$name\"; filename=\"".$value['name']."\"\r\nContent-Type:".$value['type']."\r\n";
}
}
$postvar.="\r\n$boundary--";
return $postvar;
}
Output for above code:
-----1465984203238231624
Content-Disposition: form-data; name="name"
himanshi
-----1465984203238231624
Content-Disposition: form-data; name="username"
wvhxc
-----1465984203238231624
Content-Disposition: form-data; name="email"
wvhxc#gmail.com
-----1465984203238231624
Content-Disposition: form-data; name="password"
vdschh
-----1465984203238231624
Content-Disposition: form-data; name="file"; filename="10940545_822721561108202_6765172210735079451_n.jpg"
Content-Type:image/jpeg
-----1465984203238231624--
Headers that are send:
Array
(
[0] => Accept:application/json,image/*
[1] => Expect:
[2] => authToken: 72b5a44d3e9c50fc81dd196d75a1b375
[3] => timestamp: 2016-06-15 09:50:03
[4] => content-type: multipart/form-data; boundary=-----1465984203238231624
[5] => deviceType:Web
[6] => apiVersion:v0.1
)
Response i get:
HTTP/1.1 400 Bad Request
Date: Wed, 15 Jun 2016 09:50:03 GMT
Server: Apache/2.2.29 (Unix) mod_wsgi/3.5 Python/2.7.10 PHP/5.6.10 mod_ssl/2.2.29 OpenSSL/0.9.8zh DAV/2 mod_fastcgi/2.4.6 mod_perl/2.0.9 Perl/v5.22.0
X-Powered-By: PHP/5.6.10
Set-Cookie: PHPSESSID=5f784328aa7571352c1ba2e127a96ef6; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
X-Content-Type-Options: nosniff
Access-Control-Expose-Headers: X-WP-Total, X-WP-TotalPages
Access-Control-Allow-Headers: Authorization
Allow: POST
Content-Length: 80
Connection: close
Content-Type: application/json; charset=UTF-8
{"status":false,"message":"Username or email is required for signup.","data":[]}
Please let me know what i am doing wrong,Thanks in advance