Taking advice from Writing Code in Your Posts, I am now using only the pre tag to fromat the PHP code in WordPress posts. It will look like this:
if (isset($_POST['h_sys_submitted'])){
$h_sys = safeEscapeString($_POST["h_sys_submitted"]);
} else{
$h_sys = '';
}
if (isset($_POST['asc_turned_to_submitted'])) {
$asc_turned_to = safeEscapeString($_POST["asc_turned_to_submitted"]);
} else{
$asc_turned_to = '';
}