xcode 8 swift 3 image file won't upload to server - php

Question

Using Xcode 8, Swift 3 and PHP.
Xcode and PHP are running without error.
Why isn't displayPic.image from simulator saved to pic1-1.png at server? All that appears is a blank file.
Xcode:
#IBAction func sendToServer(_ sender: UIButton) {
let url = NSURL(string: "http://www.example.com/picSaver.php")
var request = URLRequest(url: url! as URL)
request.httpMethod = "POST"
var boundary = generateBoundaryString()
request.setValue("multipart/form-data; boundary=\(boundary)",
forHTTPHeaderField: "Content-Type")
if (displayPic.image == nil)
{ return }
let image_data = UIImagePNGRepresentation(displayPic.image!)
var body = NSMutableData()
let fname = "porch-167.png"
let mimetype = "image/png"
body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
body.append("Content-Disposition:form-data;
name=\"photo\"\r\n\r\n".data(using: String.Encoding.utf8)!)
body.append("Incoming\r\n".data(using: String.Encoding.utf8)!)
body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
body.append("Content-Disposition:form-data; name=\"file\";
filename=\"\(fname)\"\r\n".data(using: String.Encoding.utf8)!)
body.append("Content-Type: \(mimetype)\r\n\r\n".data(using:
String.Encoding.utf8)!)
body.append(image_data!)
body.append("\r\n".data(using: String.Encoding.utf8)!)
body.append("--\(boundary)--\r\n".data(using:
String.Encoding.utf8)!)
request.httpBody = body as Data
let session = URLSession.shared
let task = session.dataTask(with: request as URLRequest) {
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error
== nil else {
print("error")
return
}
let dataString = String(data: data!, encoding:
String.Encoding(rawValue: String.Encoding.utf8.rawValue))
print(dataString)
}
task.resume()
}
}
func generateBoundaryString() -> String {
return "Boundary-\(NSUUID().uuidString)"
}
picSaver.php
<?php
$p=$_REQUEST["filename"]
move_uploaded_file($p["tmp_name"], pic1-1.png);
$data=Array("Reply"=>"Image saved at server");
echo json_encode($data);
?>
Is "filename" the correct parameter request for $p $_REQUEST ?

Answer 1

It works flawlessly now. Change $_REQUEST to $_FILES, and "filename" to "file"
<?php
$p=$_FILES["file"]
move_uploaded_file($p["tmp_name"], "pic1-1.png");
$data=Array("Reply"=>"Image saved at server");
echo json_encode($data);
?>