Description

Since we are posting snippets, it would be nice if I would have one too, right?

So this is a simple function I use to extract file extension in a cms for a <noname> webpage when user will upload a file.

I have added a check so you can see how it works then. For example, images.

Code (php)

function get_extension($file) {
    $file = explode(".", $file);
    $file = array_reverse($file);
    $file = $file[0];
 
    return $file;
}
 
$allowed = array ("jpg","gif","png");
 
if (!in_array(get_extension($file),$allowed)) {
     print 'Error message.';
}
else {
   // rest of the code
}