Multiple if Statements within a function in an Object?

Hi i need to check if an Object can have 0 or 1 for two parameters which are R1 and R2 - it's like directions from Obj A to Obj B - Where 1 means Obj A can access Obj B and 0 means Obj A cannot access Obj B. My if statements work until the first true statement. How to make them check both R1 and R2 directions

<?php

class MyObject {

    function directionsRn($R1, $R2, $objSource, $objDest) {


        if ($R1 == 1) {

            echo("$objSource can access $objDest via R1 <br>");

            } else if ($R1 == 0) {

                       echo("SORRY, but $objSource CANNOT access $objDest via R1 <br>");

                       } else if ($R2 == 1) {

                                  echo("$objSource can access $objDest via R12<br>");

                                  }  else if ($R2 == 0) {

                                              echo("SORRY, but $objSource CANNOT access $objDest via R1 <br>");

                                              } 

    }           

}

$myObject_array[0] = new MyObject();

$myObject_array[0]->directionsRn(0, 0, 'A', 'B');

print_r($myObject_array);



?>