Created on 17/01/2008 12:30 by Sébastien Hordeaux

function validate_extension($file_name) {
 
    $ext_array = array(".zip",".rar",".jpg",".jpeg",".gif",".bmp");
    $extension = strtolower(strrchr($file_name,"."));
    $ext_count = count($ext_array);
 
 
    if (!$file_name) {
        return false;
    } else {
        if (!$ext_array) {
            return true;
        } else {
            foreach ($ext_array as $value) {
                $first_char = substr($value,0,1);
                    if ($first_char <> ".") {
                        $extensions[] = ".".strtolower($value);
                    } else {
                        $extensions[] = strtolower($value);
                    }
            }
 
 
            foreach ($extensions as $value) {
                if ($value == $extension) {
                    $valid_extension = "TRUE";
                }
            }
 
 
            if ($valid_extension) {
                return true;
            } else {
                return false;
            }
        }
    }
}