<?php
//define('IMAGE_DIR', $_SERVER['DOCUMENT_ROOT']."/images/");
//echo IMAGE_DIR;
// requires php5
	define('UPLOAD_DIR', 'images/');
	$img = $_POST['img'];
	$img = str_replace('data:image/png;base64,', '', $img);
	$img = str_replace(' ', '+', $img);
	$data = base64_decode($img);
	$file = UPLOAD_DIR . uniqid() . '.png';
	$success = file_put_contents($file, $data);
	print $success ? $file : 'Unable to save the file.';
/*
$filename=$_REQUEST['filename'];
$myfile = fopen($filename, "w") or die("Unable to open file!");
$data = base64_decode($_REQUEST['image']);
file_put_contents($filename, $data);
fclose($myfile);
*/
?>