save_image.inc

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<?php
 
$image = $_POST["img"];
$filename = checkIdentifier($_POST["filename"]);
 
trace($image, 3);
 
$image = str_replace(array(";", ","), array(":", ":"), $image);
 
list($protocol,$mimeType,$encoding,$data) = explode(":", $image);
 
 
if ($encoding == "base64")
{
     $data = base64_decode($data);
}
 
header("Pragma: private");
header("Content-Disposition: attachment;filename=\"{$filename}.png\"");
header("Cache-Control: must-revalidate");
header("Content-Type: $mimeType");
echo $data;
?>