upload.php

<?php
$storeFolder = 'uploads/';
// // if folder doesn't exists, create it
// if(!file_exists($storeFolder) && !is_dir($storeFolder)) {
//     mkdir($storeFolder);
// }

// echo "<pre>";
// print_r($_POST);
// print_r($_FILES);
// echo "</pre>";
// die;

if (!empty($_FILES)) {
    // echo "<pre>";
    // print_r($_FILES);
    // echo "</pre>";
    // die;
    /**
     *  uploadMultiple = false
     *  When uploading file by file, upload on fly
     *  
     */
    // $tempFile = $_FILES['file']['tmp_name'];        
    // $targetFile =  $storeFolders . $_FILES['file']['name'];
    // move_uploaded_file($tempFile,$targetFile); 
    
   /**
     *  uploadMultiple = true
     *  When uploading multiple files in a single request.
     *  Way to go if using dropzone in a form with other fields,
     *  and when uploading files on form submit via button... myDropzone.processQueue(); 
     *
     *  $_FILES['file']['tmp_name'] is an array so have to use loop
     *
     */
    foreach($_FILES['file']['tmp_name'] as $key => $value) {
        $tempFile = $_FILES['file']['tmp_name'][$key];
        $targetFile =  $storeFolder. $_FILES['file']['name'][$key];
        move_uploaded_file($tempFile,$targetFile);
    }
}