Hi - I'm new to PHP but not to development. Could use the experts help here

1) Can someone show me how to : Be able to execute a command or run an executable on a server and bring back the results/output back to the HTML?

2) I'd like to create 3d graphs and Dasboards without having to pay an arm and a leg. Can someone recommend a good package, that is easy to work with in PHP?

Thanks
Stan