Both circle with radius ' r ' and ' R ' have center ( 0 , 0 )
$ r = 8 ; $ R = 4 ; $ r1 = 2 ; $ x1 = 6 ; $ y1 = 0 ; if ( checkcircle ( $ r , $ R , $ r1 , $ x1 , $ y1 ) ) echo " yes " , " STRNEWLINE " ; else echo " no " , " STRNEWLINE " ; ? >