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Help with displaying the file extension message


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I'm trying to determine why when I select Upload, on the html page I see a message "My extension is:" only, instead of My extension is: webM" for example.Here's the code, I look forward to any assistance:

foreach (array('video', 'audio') as $type) {
    if (isset($_FILES["${type}-blob"])) {

        $fileName = $_POST["${type}-filename"];
        $uploadDirectory = 'uploads/' . $fileName;

            // make sure that one can upload only allowed audio/video files
            $allowed = array(

    $extension = pathinfo($filePath, PATHINFO_EXTENSION);
    die("My extension is: " . $extension);

   if (!$extension || empty($extension) || !in_array($extension, $allowed)) {
        echo 'Invalid file extension: '.$extension;
        if (!move_uploaded_file($_FILES["${type}-blob"]["tmp_name"], $uploadDirectory)) {
            echo (" problem moving uploaded file");


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Thanks for your reply. I don't know the answer. Maybe you can help me, I probably have the code incorrect.

Here's the corresponding javascript that it's working with save1.php (the code I posted above):

<video id="video" autoplay="true" controls muted playsInline></video>

function supportsRecording(mimeType) {
  if (!window.MediaRecorder) {
    return false;
  if (!MediaRecorder.isTypeSupported) {
    return mimeType.startsWith("audio/mp4") || mimeType.startsWith("video/mp4");
  return MediaRecorder.isTypeSupported(mimeType);

var video = document.querySelector("video");
let params = { audio: true, video: { facingMode: { exact: "environment" } } };

//if (navigator.mediaDevices.getUserMedia) {
 // navigator.mediaDevices.getUserMedia({ video: true })
   // .then(function (stream) {
   //   video.srcObject = stream;
   // })
   // .catch(function (err0r) {
  //    console.log("Something went wrong!");
  //  });

let blobs = [];
let stream, mediaRecorder, blob;

async function startRecording() {
  stream = await navigator.mediaDevices.getUserMedia({
    audio: true,
    video: true,

  mediaRecorder = new MediaRecorder(stream);
  mediaRecorder.ondataavailable = (event) => {
    // Let's append blobs for now, we could also upload them to the network.
    if (event.data) {
  mediaRecorder.onstop = doPreview;
  // Let's receive 1 second blobs

function endRecording() {
  // Let's stop capture and recording
  stream.getTracks().forEach((track) => track.stop());

function doPreview() {
  if (!blobs.length) {
  // Let's concatenate blobs to preview the recorded content
  blob = new Blob(blobs, { type: mediaRecorder.mimeType });
  video.src = URL.createObjectURL(


      function uploadFile() {
	  // create FormData
	  var fileType = 'video'; // or "audio"
	  var fileName = 'ABCXYZ.webm';
	  var formData = new FormData();
	  var request = new XMLHttpRequest;

	  formData.append(fileType + '-filename', fileName);
	  formData.append(fileType + '-blob', blob);
	  request.open("POST", "/save1.php");
	  request.onreadystatechange = function() {
	  if(request.readyState==4) {




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