PHP的取值问题

echo $("classname".$_GET["ID"]);
试一下？？？

解决方案 »

免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货

AddClass.php中:
$id = $_GET['ID'];
$name = "classname".$id;
$classname = $_POST["$name"];
echo $_POST["classname".$_GET["ID"]];
AddClass.php
<?php
require("db_connect.php");
if ($action=="add"){
$sql="insert into classname(ClassName)values('".$ClassName."')";
$query=mysql_query($sql,$conn);
}
if ($action=="update"){
$ClassName=$_POST["classname".$_GET["ID"]];
$sql="update classname set(ClassName='".$ClassName."') where ID=".$ID."";
$query=mysql_query($sql,$conn);
}
if ($action=="del"){
$sql="delete from ClassName where ID=".$ID."";
$query=mysql_query($sql,$conn);
}
$sql="select * from ClassName order by Place";
$query=mysql_query($sql,$conn);?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>PHP新闻管理系统</title>
<link href="css/cssForMenu.css" rel="stylesheet" type="text/css">
</head><body topmargin="0" leftmargin="0" bgcolor="#efefef">
<table width="100%" border="0" cellspacing="0" cellpadding="0" align="center">
  <tr>
    <td bgcolor="#D1E9E9"><table width="100%" border="0" cellpadding="0" cellspacing="0">
        <tr>
          <td width="587" height="22"><strong></strong></td>
        </tr>
      </table></td>
  </tr>
</table><br>
<form name="form1" method="POST" action="">
  <table width="350" border="0" align="center" cellpadding="3" cellspacing="1" bgcolor="cccccc">
    <tr align="center" bgcolor="#dfdfdf">
      <td height="20">类别名称</td>
      <td>级别</td>
      <td>修改</td>
      <td>删除</td>
    </tr>
<?php
while ($line=mysql_fetch_array($query)){
?>
    <tr align="center">
      <td bgcolor="#efefef"><input name="ClassName<?php echo $line["ID"];?>" type="text" id="ClassName<?php echo $line["ID"];?>" value="<?php echo $line["ClassName"];?>"></td>
      <td bgcolor="#efefef"><select name="Place" id="Place">
          <option>10</option>
        </select> </td>
      <td bgcolor="#efefef"> <input type="submit" name="Submit" value="修改" onClick="form1.action='AddClass.php?ID=<?php echo $line["ID"]; ?>&action=update'"></td>
      <td bgcolor="#efefef"> <input type="submit" name="Submit2" value="删除" onClick="form1.action='AddClass.php?ID=<?php echo $line["ID"]; ?>&action=del'"></td>
    </tr>
  <?php
   }
   mysql_free_result($query);
   mysql_close($conn);
?>
  </table>
</form>
<br>
<form action="AddClass.php?action=add" method="post" name="form" id="form">
  <table width="350" border="0" align="center" cellpadding="3" cellspacing="1" bgcolor="cccccc">
    <tr align="center" bgcolor="dfdfdf">
      <td height="20" colspan="3">增加类别名称</td>
    </tr>
    <tr align="center">
      <td width="172" bgcolor="#efefef"><input name="ClassName" type="text" id="deptname2"></td>
      <td width="51" bgcolor="#efefef"> <input name="reset" type="reset" id="reset" value="重置"></td>
      <td width="105" bgcolor="#efefef"> <input type="submit" name="Submit3" value="增加类别名称">
      </td>
    </tr>
  </table>
</form>
</body>
</html>网站的源代码是这样的，我怎么也得不到值.
高手们指点一下我把
<form name="form1" action="" method="post">
<input type="text" name="classname" >
</form>
<?php
$classname=$_post['ClassName'];
?>
为什么我这样取值得不到数据呢？
$classname=$_POST['ClassName'];

$_POST是要大写的