大家帮我看看问题出在哪？

icepoint · 发表于 2003-8-7 19:35:59

##############################
###以下是problem1.php的内容###
##############################
<?
session_start();
if(!isset($_SESSION['class']))
{
$_SESSION['class'] = "temp";
}
echo "<meta http-equiv=Refresh content=0;url=problem2.php>";
exit;
?>

##############################
###以下是problem2.php的内容###
##############################

<?
session_start(); //已经声明了变量$_SESSION['class']并初始为“temp”

if($change == "yes")
{
echo "\$class is :" . $class . "<br>";
$_SESSION['class'] = $class;
echo "\$_SESSION['class'] is :" . $_SESSION['class'];
exit;
}
?>

<html>
<head>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div align="center">
  <form name="form1" method="post" action=<?=$_SERVER['PHP_SELF']?>>
<table border="0" cellspacing="1" cellpadding="4">
   <tr align="center" valign="middle">
      <td colspan="2">请选择：</td>
   </tr>
   <tr align="center" valign="middle">
      <td>年级</td>
      <td>
      <select name="class">
            <option value="1997">1997级</option>
            <option value="1998">1998级</option>
            <option value="1999">1999级</option>
            <option value="2000">2000级</option>
            <option value="2001">2001级</option>
            <option value="2002">2002级</option>
            <option value="2003">2003级</option>
            <option value="2004">2004级</option>
            <option value="2005">2005级</option>
            <option value="2006">2006级</option>
            <option value="2007">2007级</option>
            <option value="2008">2008级</option>
            <option value="2009">2009级</option>
            <option value="未选年级" selected>未选年级</option>
      </select>
      </td>
   </tr>
   <tr align="center" valign="middle">
      <td colspan="2">
      <input type="hidden" name="change" value="yes">
      <input type="submit" name="Submit" value="确定">
      </td>
   </tr>
</table>
  </form>
</div>
</body>
</html>

######################################
###以下是执行problem1.php结果的内容###
######################################
I got this:
$class is :temp
$_SESSION['class'] is :temp

而我本身是想把<select>class的值赋给$_SESSION['class']，
谁能告诉我这样做问题出在哪？

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