Saving image on db mysql through swift - php

Question

i have a problem with my php file.
I'm trying to upload an image through xcode to mysql db.
here's swift code
let image = UIImage(named: "image.jpg")
var imageData = UIImageJPEGRepresentation(image, 1)
if imageData != nil{
var request = NSMutableURLRequest(URL: NSURL(string:"link php file")!)
var session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
var boundary = NSString(format: "---------------------------14737809831466499882746641449")
var contentType = NSString(format: "multipart/form-data; boundary=%#",boundary)
request.addValue(contentType, forHTTPHeaderField: "Content-Type")
var body = NSMutableData.alloc()
// Image
body.appendData(NSString(format: "--%#\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(NSString(format:"Content-Disposition: attachment; name=\"userfile\"; filename=\"img.jpg\"").dataUsingEncoding(NSUTF8StringEncoding)!)
//body.appendData(NSString(format: "Content-Type: application/octet-stream\r\n\r\n").dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(imageData)
body.appendData(NSString(format: "\r\n--%#--\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!)
request.HTTPBody = body
var returnData = NSURLConnection.sendSynchronousRequest(request, returningResponse: nil, error: nil)
var returnString = NSString(data: returnData!, encoding: NSUTF8StringEncoding)
println("returnString \(returnString)")
}
and here's php code:
$myparam = $_FILES['userfile']; //getting image Here //getting textLabe Here
$target_path = "uploads/".basename($myparam['filename']);
if(move_uploaded_file($myparam['tmp_name'], $target_path)){
$var = 1;
}
else {
$var = 0;
}
$myarray = array("response" => $var, "path" => $target_path);
$out = json_encode($myarray);
echo($out);
the problem is in the path. it returns wrong path and so i found no image in "uploads" folder. if i change target_path in php file (for example $target_path = "uploads/image.jpg"), image is saved.
i think it's a very easy problem but i don't understand what i have to change.
thanks for any help
hi