I don’t know, this is more a PHP/general JavaScript question than a GoJS question.
It might be that you are using double quotes in both places. Try changing the expression to single quotes:
'<?php echo $allnodes2 ?>';
I don’t know, this is more a PHP/general JavaScript question than a GoJS question.
It might be that you are using double quotes in both places. Try changing the expression to single quotes:
'<?php echo $allnodes2 ?>';