How do I concatenate these fields to send to another db?

I have a web app that grabs certain info and sends it to another db.  Everything is working perfectly, except I need the attached three fields to be added to one description textarea in the other db.

what's happening is goals is the only one showing in the the description field, so it is overwriting summary and obj.  how do i concatenate this before sending to the other app so everything appears in the description textboxStart Free Trial

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$TR['description']=$this->answer['summary'];  //Proj Summary
           $TR['description']=$this->answer['obj'];  //Objective
            $TR['description']=$this->answer['goals']; //Goals