Error Php Code ([PHP][/PHP])

[omerasher]

hello all!
i am open thread and i am add " 123 [/ PHP]"
and i am getting this:
[PHP]

https://vborg.vbsupport.ru/external/2012/08/71.png

[omerasher]

its a vb 4 ! the new ... 4.2.0