我创建了一个包含项目列表和管理面板的数据库。虽然我可以添加和删除表格数据，但我无法更新表格数据。
似乎edit_item功能似乎不起作用，我无法发现原因。
档案：item_list.php
<?php include "../includes/db.php";
if(isset($_POST['item_submit'])){
$item_title = mysqli_real_escape_string($conn, strip_tags($_POST['item_title']));
$item_description = mysqli_real_escape_string($conn, $_POST['item_description']);
$item_category = mysqli_real_escape_string($conn, strip_tags($_POST['item_category']));
$item_quantity = mysqli_real_escape_string($conn, strip_tags($_POST['item_quantity']));
$item_cost = mysqli_real_escape_string($conn, strip_tags($_POST['item_cost']));
$item_price = mysqli_real_escape_string($conn, strip_tags($_POST['item_price']));
$item_discount = mysqli_real_escape_string($conn, strip_tags($_POST['item_discount']));
$item_delivery = mysqli_real_escape_string($conn, strip_tags($_POST['item_delivery']));
if(isset($_FILES['item_image']['name'])){
$file_name = $_FILES['item_image']['name'];
$path_address = "../images/products/$file_name";
$path_address_db = "images/products/$file_name";
$img_confirm = 1;
$file_type = pathinfo($_FILES['item_image']['name'], PATHINFO_EXTENSION);
if($_FILES['item_image']['size'] > 2000000){
$img_confirm = 0;
echo 'The file size is too large';
}
if($file_type != 'jpg' && $file_type != 'png' && $file_type != 'gif'){
$img_confirm=0;
echo 'The image type is not elligible';
}
if($img_confirm == 0){
alert('Mission Failed');
}
else{
if(move_uploaded_file($_FILES['item_image']['tmp_name'], $path_address)){
$item_ins_sql = "INSERT INTO items (item_image, item_title, item_description, item_cat, item_quantity, item_cost, item_price, item_discount, item_delivery) VALUES ('$path_address_db', '$item_title', '$item_description', '$item_category', '$item_quantity', '$item_cost', '$item_price', '$item_discount', '$item_delivery')";
$item_ins_run = mysqli_query($conn, $item_ins_sql);
}
}
}
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Online Shopping - Admin Panel</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src = "../js/jquery.js"></script>
<script src = "../js/bootstrap.js"></script>
<script>
function get_item_list_data(){
xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function(){
if(xmlhttp.readyState = 4 && xmlhttp.status == 200 ){
document.getElementById('get_item_list_data').innerHTML = xmlhttp.responseText;
}
}
xmlhttp.open('GET', 'item_list_process.php', true);
xmlhttp.send();
}
function del_item(item_id){
xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function(){
if(xmlhttp.readyState = 4 && xmlhttp.status == 200 ){
document.getElementById('get_item_list_data').innerHTML = xmlhttp.responseText;
}
}
xmlhttp.open('GET', 'item_list_process.php?del_item_id='+item_id, true);
xmlhttp.send();
}
function edit_item(){
item_id = document.getElementById('up_item_id').value;
item_title = document.getElementById('item_title').value;
item_description = document.getElementById('item_description').value;
item_category = document.getElementById('item_category').value;
item_quantity = document.getElementById('item_quantity').value;
item_cost = document.getElementById('item_cost').value;
item_price = document.getElementById('item_price').value;
item_discount = document.getElementById('item_discount').value;
item_delivery = document.getElementById('item_delivery').value;
xmlhttp.open('GET', 'item_list_process.php?up_item_id='+item_id+'&item_title='+item_title+'&item_description='+item_description+'&item_category='+item_category+'&item_quantity='+item_quantity+'&item_cost='+item_cost+'&item_price='+item_price+'&item_discount='+item_discount+'&item_delivery='+item_delivery, true);
xmlhttp.send();
}
</script>
</head>
<body onload = "get_item_list_data();">
<?php include "includes/header.php"; ?>
<div class="container">
<button class="btn btn-danger" data-toggle="modal" data-backdrop="static" data-keyboard="false" data-target="#add_new_item">Add New Item</button>
<div id="add_new_item" class="modal fade">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Add New Item</h4>
</div>
<div class="modal-body">
<form method="post" enctype="multipart/form-data">
<div class="form-group">
<label>Item Image</label>
<input type="file" name="item_image" class="form-control" required>
</div>
<div class="form-group">
<label>Item Title</label>
<input type="text" name="item_title" class="form-control" required>
</div>
<div class="form-group">
<label>Item Description</label>
<textarea name="item_description" class="form-control" required></textarea>
</div>
<div class="form-group">
<label>Item Category</label>
<select class="form-control" name="item_category" required>
<option>Select Category</option>
<?php
$cat_sql = "SELECT * FROM item_cat";
$cat_run = mysqli_query($conn, $cat_sql);
while($cat_rows = mysqli_fetch_assoc($cat_run)){
$cat_name = ucwords($cat_rows['cat_name']);
if($cat_rows['cat_slug'] == ''){
$cat_slug = $cat_rows['cat_name'];
}
else{
$cat_slug = $cat_rows['cat_slug'];
}
echo"
<option value='$cat_slug'>$cat_name</option>
";
}
?>
</select>
</div>
<div class="form-group">
<label>Item Quantity</label>
<input type="number" name="item_quantity" class="form-control" required>
</div>
<div class="form-group">
<label>Item Cost</label>
<input type="number" name="item_cost" class="form-control" required>
</div>
<div class="form-group">
<label>Item Price</label>
<input type="number" name="item_price" class="form-control" required>
</div>
<div class="form-group">
<label>Item Discount</label>
<input type="number" name="item_discount" class="form-control" required>
</div>
<div class="form-group">
<label>Item Delivery</label>
<input type="number" name="item_delivery" class="form-control">
</div>
<div class="form-group">
<input type="submit" name="item_submit" class="btn btn-primary btn-block">
</div>
</form>
</div>
<div class="modal-footer">
<button class="btn btn-danger" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<br><br>
<div id="get_item_list_data">
<!-- Item List Area -->
</div>
</div>
<br>
<hr/>
<br>
<?php include "includes/footer.php"; ?>
</body>
</html>
文件：item_list_process.php
<?php include "../includes/db.php";
if(isset($_REQUEST['del_item_id'])){
$del_sql = "DELETE FROM items WHERE item_id = '$_REQUEST[del_item_id]'";
mysqli_query($conn, $del_sql);
}
if(isset($_REQUEST['up_item_id'])){
$item_title = mysqli_real_escape_string($conn, strip_tags($_REQUEST['item_title']));
$item_description = mysqli_real_escape_string($conn, $_REQUEST['item_description']);
$item_category = mysqli_real_escape_string($conn, strip_tags($_REQUEST['item_category']));
$item_quantity = mysqli_real_escape_string($conn, strip_tags($_REQUEST['item_quantity']));
$item_cost = mysqli_real_escape_string($conn, strip_tags($_REQUEST['item_cost']));
$item_price = mysqli_real_escape_string($conn, strip_tags($_REQUEST['item_price']));
$item_discount = mysqli_real_escape_string($conn, strip_tags($_REQUEST['item_discount']));
$item_delivery = mysqli_real_escape_string($conn, strip_tags($_REQUEST['item_delivery']));
$item_id = $_REQUEST['up_item_id'];
$item_up_sql = "UPDATE items SET item_title='$item_title', item_description='$item_description', item_category='$item_category', item_quantity='$item_quantity', item_cost='$item_cost', item_price='$item_price', item_discount='$item_discount', item_delivery='$item_delivery' WHERE item_id = '$item_id' ";
$item_up_run = mysqli_query($conn, $item_up_sql);
}
?>
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>Serial No.</th>
<th>Item Image</th>
<th>Item Title</th>
<th>Item Description</th>
<th>Item Category</th>
<th>Item Qty</th>
<th>Item Cost</th>
<th>Item Price</th>
<th>Item Discount</th>
<th>Item Delivery</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<?php
$c = 1;
$sel_sql = "SELECT * FROM items";
$sel_run = mysqli_query($conn, $sel_sql);
while($rows = mysqli_fetch_assoc($sel_run)){
$discounted_price = $rows['item_price'] - $rows['item_discount'];
echo"
<tr>
<td>$c</td>
<td><img src = '../$rows[item_image]' style = 'width:60px'</td>
<td>$rows[item_title]</td>
<td>$rows[item_description]</td>
<td>$rows[item_cat]</td>
<td>$rows[item_quantity]</td>
<td>$rows[item_cost]</td>
<td>$rows[item_price]</td>
<td>$discounted_price ($rows[item_discount])</td>
<td>$rows[item_delivery]</td>
<td>
<div class='dropdown'>
<button class='btn btn-danger dropdown-toggle' data-toggle='dropdown'>
Actions<span class='caret'></span>
</button>
<ul class='dropdown-menu dropdown-menu-right'>"; ?>
<li>
<a href="#edit_modal_<?php echo $rows['item_id']; ?>" data-toggle='modal'>Edit</a>
</li>
<li><a href="javascript:;" onclick="del_item(<?php echo $rows['item_id']; ?>);">Delete</a></li>
</ul>
</div>
<div class='modal fade' id="edit_modal_<?php echo $rows['item_id']; ?>">
<div class='modal-dialog'>
<div class='modal-content'>
<div class='modal-header'>
<button class='close' data-dismiss='modal'>×</button>
<h4 class='modal-title'>Edit Item</h4>
</div>
<div class='modal-body'>
<div id='form1'>
<div class='form-group'>
<label>Item Title</label>
<input type='text' id='item_title' value='<?php echo $rows['item_title']; ?>' class='form-control' required>
</div>
<div class='form-group'>
<label>Item Description</label>
<textarea id='item_description' value='<?php echo $rows['item_description']; ?>' class='form-control' required></textarea>
</div>
<div class='form-group'>
<label>Item Category</label>
<select class='form-control' id='item_category' required>
<option>Select Category</option><?php
$cat_sql = "SELECT * FROM item_cat";
$cat_run = mysqli_query($conn, $cat_sql);
while($cat_rows = mysqli_fetch_assoc($cat_run)){
$cat_name = ucwords($cat_rows['cat_name']);
if($cat_rows['cat_slug'] == ''){
$cat_slug = $cat_rows['cat_name'];
}
else{
$cat_slug = $cat_rows['cat_slug'];
}
echo "
<option value='$cat_slug'>$cat_name</option>
";
}
?>
</select>
</div>
<div class='form-group'>
<label>Item Quantity</label>
<input type='number' id='item_quantity' value='<?php echo $rows['item_quantity']; ?>' class='form-control' required>
</div>
<div class='form-group'>
<label>Item Cost</label>
<input type='number' id='item_cost' value='<?php echo $rows['item_cost']; ?>' class='form-control' required>
</div>
<div class='form-group'>
<label>Item Price</label>
<input type='number' id='item_price' value='<?php echo $rows['item_price']; ?>' class='form-control' required>
</div>
<div class='form-group'>
<label>Item Discount</label>
<input type='number' id='item_discount' value='<?php echo $rows['item_discount']; ?>' class='form-control' required>
</div>
<div class='form-group'>
<label>Item Delivery</label>
<input type='number' id='item_delivery' value='<?php echo $rows['item_delivery']; ?>' class='form-control'>
</div>
<div class='form-group'>
<input type='hidden' id='up_item_id' value='<?php echo $rows['item_id']; ?>'>
<button onclick="edit_item()" class='btn btn-success btn-block'>Submit</button>
</div>
</div>
</div>
<div class='modal-footer'>
<button class='btn btn-danger' data-dismiss='modal'>Close</button>
</div>
</div>
</div>
</td>
</tr><?php
$c++;
}
?>
</tbody>
</table>