<!-- a form in order to select file from the computer
Ref: http://www.w3schools.com/php/php_file_upload.asp -->

<form action="upload_file.php" method="post" enctype="multipart/form-data">
    Select file to upload:
    <input type="file" name="fileToUpload" id="fileToUpload">
    <input type="submit" value="Upload File" name="submit">
</form>