另一种和 "if-else"家族控制语句功能几乎相同的是PHP的"switch"语句。它看起来如下所示：
--------------------------------------------------------------------------------
switch (决定变量)
{
case 第一个条件正确:
do this!
case 第二个条件正确:
do this!
case 第三个条件正确:
do this!
... 等等...
}
--------------------------------------------------------------------------------
我们将通过使用"switch" 语句重写上面的幸运甜饼例子来把这些说明的更清楚一些：
[cookie.php]
--------------------------------------------------------------------------------
// 这里的决定变量是用户选择的日期
switch ($day)
{
// 第一种情况
case "Monday":
$fortune = "当能找到使每件事做的复杂精彩的方法的时候，不要使它简单有效";
break;
// 第二种情况
case "Tuesday":
$fortune = "生活是游戏的桥梁?-你一定施展某种巧计了。";
break;
// 第三种情况
case "Wednesday":
$fortune = "什么能使头脑清醒的人生活在这个世界上永不发疯？";
break;
// 第四种情况
case "Thursday":
$fortune = "不要疯狂，要有趣";
break;
// 第四种情况
case "Friday":
$fortune = "仅仅跟着时代走，顺着风气行，当你得到提升时你会发现类型是个魔鬼。";
break;
// 如果以上条件都不符合...
default:
$fortune = "很抱歉，周末关门";
break;
}
?>
这是您的幸运语:
--------------------------------------------------------------------------------
有两个重要的关键字：关键字"break"用来打断 "switch" 语句结构并且立即移到结构块外面，然后运行块后面紧跟着的行。 "default" 关键字用来执行当传给 "switch" 的变量都不符合语句结构中所列举的任何一种情况时所设定的语句。
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