Question

一个PHP的switch语句不管选哪个都只输出了 default语句

<?
switch ($find){
case "a":
echo "<p>Regular customer</p>";
break;
case "b":
echo "<p>TV</p>";
break;
case "c":
echo "phone";
break;
case "d":
echo "mouth of somewhere";
break;
default:
echo "<p>do not know</p>";
break;
}
?>

至于HTML里是这样的
<tr>
<td>How did you find bob's?</td>
<td><select name="find">
<option value= "a" >i am a regular cunsomer</option>
<option value= "b" >TV</option>
<option value= "c" >phone</option>
<option value= "d" >word of mouth</option>
</select>
</td>
</tr>
这是其中一段 find这个变量已经有了。。

Answer 1

我不知道你是不是因为没有加表单的关系。。。。
php
<?php
if(isset($_GET['ok'])){
switch ($_POST['find']){
case "a":
echo "<p>Regular customer</p>";
break;
case "b":
echo "<p>TV</p>";
break;
case "c":
echo "phone";
break;
case "d":
echo "mouth of somewhere";
break;
default:
echo "<p>do not know</p>";
break;
}
}
?>

html
<form action="?ok" method="post">
<select name="find">
<option value= "a" >i am a regular cunsomer</option>
<option value= "b" >TV</option>
<option value= "c" >phone</option>
<option value= "d" >word of mouth</option>
</select>
<input name="提交" type="submit" value="提交">
</form>

测试过，没问题

Answer 2

switch($i){

case 1: echo 1;break;
case 2: echo 2;break;
default:echo 0;
}
case 里break必须有，不然会继续执行，

Answer 3

打印$find这个值看看是什么?
建议用 1 2 3 4 不要用 a b c d

Answer 4

程序没有获取select选取哪个option值的代码