how to add custom php /html code in sidebar as a block or widget urgent pls help?

[BAROTTA]

how to add custom php /html code in sidebar as a block or widget urgent pls help?

before 4.7,  portal blocks helped in doing this tweak , as portal is now incompatible please help out 

[Marc]

You would only be able to do this with either a 3rd party application or with the pages application. Unfortunately as you do not own the pages application at present, there is no way for you to do this in the core platform without development.