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"; 
} 
?>