<?php include('globalvariables.php'); ?>
<?php

// make sure the image-data exists and is not empty
// xampp is particularly sensitive to empty image-data 
if ( isset($_POST["image"]) && !empty($_POST["image"]) ) { 
 define('UPLOAD_DIR', $_POST["uploadDir"]);
 // get the dataURL
 $dataURL = $_POST["image"]; 

 // the dataURL has a prefix (mimetype+datatype) 
 // that we don't want, so strip that prefix off
 $parts = explode(',', $dataURL); 
 $data = $parts[1]; 

 // Decode base64 data, resulting in an image
 $data = base64_decode($data); 

 // create a temporary unique file name
 $file = $TOOLHOME . UPLOAD_DIR . $_POST["name"]; 

 // write the file to the upload directory
 $success = file_put_contents($file, $data);

 // return the temp file name (success)
 // or return an error message just to frustrate the user (kidding!)
 print $success ? $file : 'Unable to save this image.';

}