[cellarius]

Usage as follows:

For vB4:

<!-- other URL parameters present - add leading question mark! -->
file.php?{vb:raw session.sessionurl}&x=a

<!-- no other URL parameters present - do not add leading question mark! -->
file.php{vb:raw session.sessionurl_q}

<!-- session hash for forms -->
<input type="hidden" name="s" value="{vb:raw session.sessionhash}" />

For vB3:

<!-- other URL parameters present - add leading question mark! -->
file.php?$session[sessionurl]&x=a

<!-- no other URL parameters present - do not add leading question mark! -->
file.php$session[sessionurl_q]

<!-- session hash for forms -->
<input type="hidden" name="s" value="$session[sessionhash]" />