php 流程控制switch的简单实例

switch (expr) {   case result1:   statement1   break;   case result2:   statement2   break;   ……   default:   statement } 

<?php switch ($x) {   case 0:   echo "x 等于 0";   break;   case 1:   echo "x 等于 1";   break;   case 2:   echo "x 等于 2";   break;   default:   echo "x 既不等于1和2，也不等于0"; } ?>