php操作ACCESS（读写改）

Conn.php
---------------------------------------------------------------------------------------------------------------------------------------------------------
<?php
$conn = @new COM("ADODB.Connection") or die ("ADO连接失败!");
$connstr = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" . realpath("include/#mydb.mdb");
$conn->Open($connstr);
//创建记录集查询
?>
Add.php
<?php
$name=$_POST['user_name'];
$content=$_POST['user_post'];
if ($name<>"" and $content<>"")
{
       if($name="admin" or $content="admin")
      {
              echo "<script language='javascript'>alert('你要干什么！');location='index.php';</script>";
       }
   include_once("include/conn.php");
   $rs = $conn->Execute("insert into contents (name,content) values ('$name','$content')");
   header("location:index.php");
   }
   else
   echo "<script language='javascript'>alert('字段不能有空！');location='index.php';</script>";
?>
Del.php
<?
session_start();
if($_SESSION['admin']=="OK")
{
include_once("include/conn.php");
$sql="delete from contents where id=".$_GET['id'];
$rs = $conn->Execute($sql);
header("location:admin_index.php");
}
?>
Show.php
<?
session_start();
if($_SESSION['admin']=="OK")
{
include_once("include/conn.php");
$sql="select * from contents where id=".$_GET['id'];
$rs = $conn->Execute($sql);
$name=$rs->Fields['name']->Value;
$content=$rs->Fields['content']->Value;
$id=$rs->Fields['id']->Value;
?>
<form action="modify_save.php" method="post" name="name1">
    ID :<?=$id?><input type="hidden" name="id" value=<?=$id?> >
    姓名:<?=$name?><br>
    留言:<textarea name="post_contents" rows="10" cols="50"><?=$content?></textarea>
    <input type="submit" value="提交修改">
   </form>
<?
}
       $rs->Close();
      $conn->Close();
      $rs = null;
      $conn = null;
?>
Edit.php
<?
session_start();
if($_SESSION['admin']=="OK")
{
include_once("include/conn.php");
$sql="update contents set content='".$_POST['post_contents']."' where id=".$_POST['id'];
$rs = $conn->Execute($sql);
}
header("location:admin_index.php");
?>