How Do I Save a Audiofile Using Fromdata Instead Of Xml?

See more:

Javascript

XML

PHP

jQuery

This is how i am saving files currently

function upload(blobOrFile) {

        var xhr = new XMLHttpRequest();
        xhr.open('POST', 'saveaudio.php', true);
        xhr.onload = function (e) {
            var result = e.target.result;
        };

        xhr.send(blobOrFile);

    }

And it saves through php using

<?php
error_log('audio save called');
$blob = $_POST['thefile'];
$filename = $_POST['filename'];

$post_data = file_get_contents('php://input');

$filePath = 'video/doesitwork.wav';
file_put_contents($filePath, $post_data);




?>

Can anyone help me save this exact way but using FormData ,Xml seems to be having issues.
Thank you