我想制作能够更新文章的CMS。当我使用更新页面时，我收到以下错误：
注意：未定义的变量：第105行的C：\ xampp \ htdocs \ website \ admin \ edit_posts.php中的post_image
这是我的代码：
<?php
session_start();
if(!isset($_SESSION['user_name'])){
header("location: ../login.php");
}
else {
?>
<html>
<head>
<title>Admin Panel</title>
<link rel="stylesheet" href="../apearance/stylesheet.css" />
</head>
<body>
<div id="navbar">
<div id="logo"><img id="logo" src="../apearance/logo.png" height="27px"></div>
<a id="button" href="view_posts.php">View Posts</a>
<a id="button" href="index.php?insert=insert">Insert New Post</a>
<a id="button" href="#">View Comments</a>
<a id="button" href="#">Webshop</a>
<a id="button" href="#">Do do list</a>
<a id="button" href="logout.php"><span style="color:red">Logout</span></a>
<br><hr>
</div>
<?php
include("includes/connect.php");
if(isset($_GET['edit'])){
$edit_id = $_GET['edit'];
$edit_query = "select * from posts where post_id = '$edit_id' ";
$run_edit = mysql_query($edit_query);
while ($edit_row = mysql_fetch_array($run_edit)){
$post_id = $edit_row['post_id'];
$post_title = $edit_row['post_title'];
$post_category = $edit_row['post_category'];
$post_header_image = $edit_row['post_header_image'];
$post_image = $edit_row['post_image'];
$post_content = $edit_row['post_content'];
$post_content2 = $edit_row['post_content2'];
$post_video = $edit_row['post_video'];
}}
?>
<div id="tile" height="100px">
<form method="post" action="edit_posts.php?edit_form=<?php $post_id; ?>" enctype="multipart/form-data">
<table align="center" border="0">
<tr>
<td align="center" colspan="2"><h1>Edit Post Here</h1></td>
</tr>
<tr>
<td align="left">Post Title:</td>
<td><input value="<?php echo $post_title; ?>" type="text" name="title" size="30"></td>
</tr>
<tr>
<td align="left">Post Category:</td>
<td><input value="<?php echo $post_category; ?>" type="text" name="category" size="30"></td>
</tr>
<tr>
<td align="left">Post header Images:</td>
<td>
<input type="file" name="header_image">
</td>
</tr>
<tr>
<td>
</td>
<td>
<img src="../images/<?php echo $post_header_image; ?>" height="100" >
</td>
</tr>
<tr>
<td align="left">Post Content:</td>
<td><textarea name="content" cols="30" rows="15"><?php echo $post_content; ?></textarea></td>
</tr>
<tr>
<td align="left">Post Images:</td>
<td><input type="file" name="files[]" multiple>
</td>
</tr>
<tr>
<td>
</td>
<td>
<?php
$values = explode(',', $post_image);
if( count($values)){
foreach($values as $value){
echo "<img src=\"../images/".$value."\" height=\"100\">";
}
}
?>
</td>
</tr>
<tr>
<td align="left">Post Content2:</td>
<td><textarea name="content2" cols="30" rows="15"><?php echo $post_content2; ?></textarea></td>
</tr>
<tr>
<td align="left">Post Video:</td>
<td><textarea name="video" cols="30" rows="15"><?php echo $post_video; ?></textarea></td>
</tr>
<tr>
<td align="right" colspan="6"><input type="submit" name="submit" value="Update Now"></td>
</tr>
</table>
</form>
</div>
</body>
</html>
<?php
if(isset($_POST['update'])){
$update_id = $_GET['edit_form'];
$post_title1 = $_POST['title'];
$post_date1 = date('m-d-y');
$post_category1 = $_POST['category'];
$post_content1 = $_POST['content'];
$post_content21 = $_POST['content2'];
$post_video1 = $_POST['video'];
$post_header_image1= $_FILES['header_image']['name'];
$header_image_tmp= $_FILES['header_image']['tmp_name'];
$filenames = array_values($_FILES['files']['name']);
$post_image1 = rtrim(implode(',', $filenames), ',');
if($post_title1=='' or $post_category1=='' or $post_content1=='' or $post_header_image1==''){
echo "<script>alert('Any of the fields is empty')</script>";
exit();
}
else {
move_uploaded_file($header_image_tmp,"../images/$post_image1");
$update_query = "update posts set post_title='$post_title1',post_date='$post_date1',post_category='$post_category1',post_header_image='$post_header_image1',post_image='$post_image1',post_content='$post_content1',post_content2='$post_content21',post_video='$post_video1' where post_id='$update_id'";
if(mysql_query($update_query)){
echo "<script>alert('Post has been updated')</script>";
echo "<script>window.open('view_posts.php','_self')</script>";
}
}
}
?>
<?php }?>
非常感谢任何帮助。