File not uploaded to the server but there are no errors

There are no errors in my IDE, and the HTTP Response from my server is 200 OK, yet the file isn't uploaded to my server.

I am using the source code from this answer.

Note: I edited my php.ini to allow larger files to be uploaded.

Here's the echo result I get from upload_file.php:

Upload: aa.jpg
Type: image/jpeg
Size: 7.4501953125 Kb
Temp file: /tmp/phpWI6NnW
Stored in: upload/aa.jpg

HTML form

<!DOCTYPE html>

<head>
<title></title>
</head>

<body>

<form action="upload_file.php" method="post" enctype="multipart/form-data">
<label for="file"><span>Filename:</span></label>
<input type="file" name="file" id="file" /> 
<br />
<input type="submit" name="submit" value="Submit" />
</form>

</body>
</html>

PHP handler (upload_file.php)

Change upload folder to preferred name. Presently saves to upload/

<?php

$allowedExts = array("jpg", "jpeg", "gif", "png", "mp3", "mp4", "wma");
$extension = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);

if ((($_FILES["file"]["type"] == "video/mp4")
|| ($_FILES["file"]["type"] == "audio/mp3")
|| ($_FILES["file"]["type"] == "audio/wma")
|| ($_FILES["file"]["type"] == "image/pjpeg")
|| ($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg"))

&& ($_FILES["file"]["size"] < 20000)
&& in_array($extension, $allowedExts))

  {
  if ($_FILES["file"]["error"] > 0)
    {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
    }
  else
    {
    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
    echo "Type: " . $_FILES["file"]["type"] . "<br />";
    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

    if (file_exists("upload/" . $_FILES["file"]["name"]))
      {
      echo $_FILES["file"]["name"] . " already exists. ";
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"],
      "upload/" . $_FILES["file"]["name"]);
      echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
      }
    }
  }
else
  {
  echo "Invalid file";
  }
?>

php.ini

;;;;;;;;;;;;;;;;
; File Uploads ;
;;;;;;;;;;;;;;;;

; Whether to allow HTTP file uploads.
; http://www.php.net/manual/en/ini.core.php#ini.file-uploads
file_uploads = On

; Temporary directory for HTTP uploaded files (will use system default if not
; specified).
; http://www.php.net/manual/en/ini.core.php#ini.upload-tmp-dir
;upload_tmp_dir =

; Maximum allowed size for uploaded files.
; http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize
upload_max_filesize = 200M

; Maximum number of files that can be uploaded via a single request
max_file_uploads = 20

Solution

If this so then it means that you have something wrong in the logic of the Web API.

Your HttpRequest executed correctly without any error but it might your Web API is not working correctly.