identify valid SVG using PHP

Question

I need to check an upload for file type SVG. Unfortunately, there's no IMAGETYPE_SVG and finfo_file does not work on my machine. How can I make sure the upload is valid? However, I do have access to GraphicsMagick via system()

Answer 1

I have found a solution using GraphicsMagick:

$valid = FALSE;
@exec("gm identify +ping filename", $result);
if (is_array($result)) {
    if (in_array("MVG", explode(" ", implode(" ", $result))) || in_array("SVG", explode(" ", implode(" ", $result)))) $valid = TRUE;
}