Is json_encode Sufficient XSS Protection?

Question

I have a stdClass object in PHP, something like

$o = new stdClass;
$o->foo = $bar

The variable $bar contains a

Answer 1

What I do is to evaluate the json object before assuming its safe. I think the method is evalJSON(true) in prototype and jquery has a similar implementation. I don't know much about xss standards with JSON but this helps me