$tempfile = tempnam(get_temppath(), "cache");
file_put_contents($tempfile, $img_str);
$data = getimagesize($tempfile);
unlink($tempfile);
$tempfile = tempnam(get_temppath(), "cache");
file_put_contents($tempfile, $img_str);
$data = getimagesize($tempfile);
unlink($tempfile);