Upload multiple files with Ajax and Move to upload by PHP with create different folder

Below the code, explain that upload multiples files by jQuery Ajax and move files using Form Data to created different folders by PHP  move_uploaded_file function. Created multiple folders by time function and create random numbers for the rand function.

HTML code for creating form input file and button to upload files.

HTML Code :

<div id="uploadMultipleFile">
<div><input type="file" multiple id="uploadMultiple" name="uploadMultiple"/></div>
<div><button id="uploadMultipleFiles">Upload Files</button></div>
</div>

Ajax and jQuery Code:

Ajax code with use form data to store files and send files to PHP file

jQuery(document).ready(function(){
jQuery('#uploadMultipleFiles').click(function(){

var form = new FormData(); 

for(var i = 0; i < jQuery('#uploadMultiple').get(0).files.length ; i++ ){
form.append('files[]', jQuery('#uploadMultiple').get(0).files[i]);
}
console.log(form);

$.ajax({
url: 'upload.php', 
cache: false,
contentType: false,
processData: false,
data: form,
type: 'post',
success: function (response) {
console.log(response);
}
});

});

});

PHP Code

<?php

if(isset($_FILES['files'])){
$no_files = count($_FILES["files"]['name']);
//echo $no_files; 
$t = date("dmygis"); 
$rand = rand(1, 20);
echo 'upload/'.$t.$rand;

$folderName = 'upload/'.$t.$rand; 
mkdir($folderName);

for ($i = 0; $i < $no_files; $i++) {
if ($_FILES["files"]["error"][$i] > 0) {
echo "Error: " . $_FILES["files"]["error"][$i] . "<br>";
} else {
move_uploaded_file($_FILES["files"]["tmp_name"][$i], $folderName.'/'.$_FILES["files"]["name"][$i]);
}

}
}

?>