switch或判断

 <?php
 $num1 = 1;
 $num2 = 2;
 function int($num){
     switch($num){
         case 1:
         case 2:
             echo "1或2";
             break;
         default:
             echo "1和2都不是";
             break;
     }
 }
 int($num1);//1或2
 int($num2);//1或2

 ?>