if (!is_writable($purifier_cache_dir)) {
$err_msg = "config: HTMLPurifier cache directory should be writable by anyone (chmod -R 777 $purifier_cache_dir)";
if (!is_writable($purifier_cache_dir)) {
$err_msg = "config: HTMLPurifier cache directory should be writable by anyone (chmod -R 777 $purifier_cache_dir)";