hello, i want to pass krumo (or print_r) output back to page after xhr request.

now i can do it from server side only via json_encode

how we can do it on the fly ?

json example:
{"form":{"changed":"","form_build_id":"form-731284d15fe95948f16160600f5e11a5","form_token":"289a8ec001b516cb220de8da79b3996b","form_id":"pass_node_form","field_pass_id":[{"value":""}],"field_pass_quest_select":[{"nid":{"nid":"Тест № \"Сова или жаворонок\" [nid:4]"}}],"menu":{"link_title":"","parent":"primary-links:0","weight":"0"},"log":"","name":"ion","date":"","status":"1","comment":"0","xmlsitemap":{"status":"default","priority":"default"},"pathauto_perform_alias":"1","group_pass_quest_matrix":[{"field_pass_question":{"value":"","format":"1"},"field_pass_quest_answer":{"value":"","format":"1"},"field_pass_quest_answer_score":{"value":""},"_weight":"0"}],"field_pass_total_score":[{"value":""}],"field_pass_complete_description":[{"value":"","format":"1"}],"field_pass_condition":{"value":"Пользователь подтвердил, сохраняем."}},"field":"field_pass_condition","op":"change"}