[FX.php List] Query question content from one field equal to content of other field for the same record?

[Gjermund Gusland Thorsen]

Query question content from one field equal to content of other field
for the same record, possible with FileMaker's XML engine?

Have anyone here noticed a way to do a query to search for two fields
with the same value?

$q->AddDBParam( 'field1', field2 );

I assume the location where I put field2 is for strings only and that
there are no ways to reference content from fields...

ggt667