Progress Bar - PHP Ajax File Uploader (Images and Zip/Rar files)

Hello right now I've a website that I use to Upload files to Amazon S3 Bucket I own, I'd like to add a progress bar to check the percentage and status of my uploading to the Amazon S3 Bucket.

This is the form and PHP code I'm using right now to accomplish the uploading

FORM :
--------------
<form id="contact-form" action="awsUpload.php" method="post" name="frmImage" enctype="multipart/form-data">
<input class="file-input" type="file" style="width:100%;"autocomplete="off" name="ftp" accept="image/*, .zip, .rar, .bzip" onchange="this.form.submit();changeStyle()" class="file-up" id="fileFTP">
</form>
-------------
PHP TO UPLOAD:
-----------
<?php
require './aws/aws-autoloader.php';

use Aws\S3\S3Client;
use Aws\S3\Exception\S3Exception;

// AWS Info
$bucketName = '****';
$IAM_KEY = '*****';
$IAM_SECRET = '*****';

// Connect to AWS
try {
// You may need to change the region. It will say in the URL when the bucket is open
// and on creation. us-east-2 is Ohio, us-east-1 is North Virgina
$s3 = S3Client::factory(array(
'credentials' => array(
'key' => $IAM_KEY,
'secret' => $IAM_SECRET
),
'version' => 'latest',
'region' => 'eu-west-1'
));

}
catch (Exception $e) {

die("Error: " . $e->getMessage());
}
// For this, I would generate a unqiue random string for the key name. But you can do whatever.
//$target_file = 'f/' . basename($_FILES["ftp"]['tmp_name']); //ftp is file name at index.php


if (isset($_FILES["ftp"]) && $_FILES["ftp"]["error"] == 0) {

$mimeType = mime_content_type($_FILES["ftp"]["tmp_name"]);
$fileSize = $_FILES["ftp"]["size"];


if (strpos($mimeType, "image") === 0) {
if ($fileSize <= 1000 * 1024 * 1024) { //max image size

$target_dir = "i/";
// $strng = preg_replace("/[\s-]|\#/", "_", basename($_FILES["ftp"]["name"])); //Prima era solo "/[\s-]/"
$target_file = $target_dir . time() . rand(100, 999);
//$pathInS3 = 'https://s3.ap-south-1.amazonaws.com/' . $bucketName . '/' . $target_file;

// Add it to S3
try {
if (!file_exists('/tmp/tmpfile')) {
echo 3;
mkdir('/tmp/tmpfile');
}

$tempFilePath = '/tmp/tmpfile/' . basename($_FILES["ftp"]['name']);
$tempFile = fopen($tempFilePath, "w") or die("Error: Unable to open file.");

$fileContents = file_get_contents($_FILES["ftp"]['tmp_name']);
$tempFile = file_put_contents($tempFilePath, $fileContents);

$s3->putObject(array(
'Bucket' => $bucketName,
'Key' => $target_file,
'SourceFile' => $tempFilePath,
'StorageClass' => 'REDUCED_REDUNDANCY',
'ACL' => 'public-read'
));

$valPOutput = htmlspecialchars($target_file);
header('HTTP/1.1 303 See Other');
header('Location: http://sharendo.io/result.php' . "?p=" . $valPOutput);

}
catch (S3Exception $e) {
die('Error:' . $e->getMessage());
}
catch (Exception $e) {
die('Error:' . $e->getMessage());
}
} else {
echo "image too big";
}
} elseif ($mimeType == "application/zip" || $mimeType == "application/x-rar-compressed" || $mimeType ==

COULD NOT UPLOAD ALL PHP CAUSE OF MAX CHARS

Tried to do but encountered the problem that when calling the form I get redirected to awsUpload.php and Javascript etc stop working.!!!!
I do not want to add a button to submit the form, everything must stay the same, only need to add a Progress Bar.