This question has been answered by multiple community members. See the first response.
Implemented in v1.1
Is PHx built into core, too?Not yet.
[*tv-name@20:is=``:then=``:else=`[*tv-name@20*]`*]
[*id:is=`16`:then=`[*pagetitle@16*]`:else=`nothing`*]
[*pagetitle@16:is=``:then=`nothing`:else=`[*pagetitle@16*]`*] or [*pagetitle@16:is=`not-this`:then=`nothing`:else=`[*pagetitle@16*]`*]
[*longtitle@16:is=``:then=`[*pagetitle@16*]`:else=`[*longtitle@16*]`*]