My file upload.php

$croped_image = $_POST['image'];
list($type, $croped_image) = explode(';', $croped_image);
list(, $croped_image)      = explode(',', $croped_image);
$croped_image = base64_decode($croped_image);
$image_name = time().'.png';
// upload cropped image to server 
file_put_contents('../upload/'.$image_name, $croped_image);