how to convert html to bbCode?

[Ja0ck5]

I found KefirBB library in stackoverflow but it's only providing converting BBCode to Html.How to convert html to BBCode?

[kefirfromperm]

Unfortunately HTML is too complex so there is not universal HTML parser. But you can define HTML subset and make a KefirBB configuration to convert it to BB codes.

[kivimango]

I second that.I need to convert back to bbcode a previously converted text.I solved this problem by downloading a javascript library and converting with it.