iControl + PhP ... Big IP LTM: Viprion

the curl you can execute from the server on which you also loaded the php page. im assuming that is a unix / linux box, if it is windows im your might try putting that URL in a browser. it is a test to see if your server can reach the big-ip fine and gets a reponse which contains data.

as for your apache / php config, can't really help with that, i would advise you to google and see what people advise to turn on. in principle usually the error from apache can provide enough hints to understand what to turn on.