网站无法在 FireFox 上运行，但可以在 Safari 和 Chrome 上运行答案

【问题标题】：Website not working on FireFox but works on Safari and Chrome网站无法在 FireFox 上运行，但可以在 Safari 和 Chrome 上运行
【发布时间】：2017-11-13 10:56:34
【问题描述】：

我制作了一个简单的网站，允许用户出售商品，然后查看待售商品的列表。它在 Safari 和 Chrome 上完美运行，但在 FireFox 上却无法运行。我只是在测试过程中遇到这个。我将发布输入表单和处理 php 的代码，然后发布我在 Firefox 中遇到的错误。

表格：

<?php
// Define variables and set to empty values
$titleErr = $descriptionErr = $priceErr = $quantityErr = $durationErr = $locationErr = "";
$title = $description = $price = $quantity = $duration = $location = "";
$valid = FALSE;

if ($_SERVER["REQUEST_METHOD"] == "POST") {
$valid = TRUE;

if (empty($_POST["title"])) {
    $titleErr = "Title is required";
    $valid = FALSE;
} 
else {
    $title = test_input($_POST["title"]);
}

if (empty($_POST["description"])) {
    $descriptionErr = "A description is required";
    $valid = FALSE;
} 
else {
    $description = test_input($_POST["description"]);
    if (!preg_match("/^[a-zA-Z ]*$/", $description)) {
        $descriptionErr = "Only letters and white space allowed";
    }
}

if (empty($_POST["price"])) {
    $priceErr = "A price is required";
    $valid = FALSE;
} 
else {
    $price = test_input($_POST["price"]);
}

if (empty($_POST["quantity"])) {
    $quantityErr = "A quantity is required";
    $valid = FALSE;
} 
else {
    $quantity = test_input($_POST["quantity"]);
}


if (empty($_POST["duration"])) {
    $durationErr = "Duration is required";
    $valid = FALSE;
} 
else {
    $duration = test_input($_POST["duration"]);
}


if (empty($_POST["location"])) {
    $locationErr = "A location is required";
    $valid = FALSE;
} 
else {
    $location = test_input($_POST["location"]);
}


// If valid then redirect
if($valid){
    header('Location: sell_your_item.php');
    exit();
}
}

// Function to remove spaces, strip slashes and allow special characters to be used in form
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}

?>
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Sell Your Item</title>
<link href="style.css" type="text/css" rel="stylesheet">
</head>

<body>


<div>
<h2>Sell your item</h2><br>
<section>
<nav id="primary_nav_wrap" data-role="navbar">
    <ul>
        <li><a href="form.php">Sell an item</a></li>
        <li><a href="list_items.php">Items for sale</a></li>
    </ul>
</nav>
</section><br><br>
<p><span class="error">* required.</span></p>
<form method="post" onsubmit='<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>' enctype="multipart/form-data">
Title: &nbsp;
<input type="text" name="title" value="<?php echo $title;?>">
<span class="error">* <?php echo $titleErr;?></span>
    <br><br>
Description: &nbsp;
<textarea class="textarea" name="description" rows="2" cols="50" value="<?php echo $description;?>">
</textarea>
<span class="error">* <?php echo $descriptionErr;?></span>
    <br><br>
Choose A Picture: &nbsp;
<input type="file" name="picture" value="<?php echo $picture;?>">
    <br><br>
Category: &nbsp;
<select name="category">
    <option 
    value="Collectables" <?php if(isset($_POST['category']) && $_POST['category'] == 'Collectables') echo "selected"; ?>    
    name="Collectables">Collectables</option>
    <option 
    value="Electronics" <?php if(isset($_POST['category']) && $_POST['category'] == 'Electronics') echo "selected"; ?>
    name="Electronics">Electronics</option>
    <option 
    value="Vehicles" <?php if(isset($_POST['category']) && $_POST['category'] == 'Vehicles') echo "selected"; ?>
    name="Vehicles">Vehicles</option>
    <option 
    value="Children" <?php if(isset($_POST['category']) && $_POST['category'] == 'Children') echo "selected"; ?>
    name="Children">Children</option>
    <option 
    value="Clothing" <?php if(isset($_POST['category']) && $_POST['category'] == 'Clothing') echo "selected"; ?>
    name="Clothing">Clothing</option>
    <option 
    value="Fitness" <?php if(isset($_POST['category']) && $_POST['category'] == 'Fitness') echo "selected"; ?>
    name="Fitness">Fitness</option>
    <option 
    value="Homegarden" <?php if(isset($_POST['category']) && $_POST['category'] == 'Homegarden') echo "selected"; ?>
    name="Homegarden">Home &amp; Garden</option>
</select>
    <br><br>
Starting Price: &nbsp;
<input type="number" name="price" min="0.01" step="0.01" value="<?php echo $price;?>">
<span class="error">* <?php echo $priceErr;?></span>
    <br><br>
Quantity: &nbsp;
<input type="number" name="quantity" min="1" max="99" value="<?php echo $quantity;?>">
<span class="error">* <?php echo $quantityErr;?></span>
    <br><br>
Duration (days): &nbsp;
<input type="number" name="duration" min="1" max="10" value="<?php echo $duration;?>">
<span class="error">* <?php echo $durationErr;?></span>
    <br><br>
Location: &nbsp;
<input type="text" name="location" value="<?php echo $location;?>">
<span class="error">* <?php echo $locationErr;?></span>
    <br><br>
Auction Type: &nbsp;
<select name="auction_type">
    <option value="Fixed_price" <?php if(isset($_POST['auction_type']) && $_POST['auction_type'] == 'Fixedprice') echo "selected"; ?>
    name="fixedprice">Fixed Price Sale</option>
    <option value="Auction" <?php if(isset($_POST['auction_type']) && $_POST['auction_type'] == 'Auction') echo "selected"; ?>
    name="auction">Auction</option>
</select>
    <br><br>
Payment Method: &nbsp;
<select name="paymentType">
    <option value="PayPal" <?php if(isset($_POST['paymentType']) && $_POST['paymentType'] == 'PayPal') echo "selected"; ?>
    name="PayPal">PayPal</option>
    <option value="Creditcard" <?php if(isset($_POST['paymentType']) && $_POST['paymentType'] == 'Creditcard') echo "selected"; ?>
    name="Creditcard">Credit Card</option>
    <option value="Bank" <?php if(isset($_POST['paymentType']) && $_POST['paymentType'] == 'Bank') echo "selected"; ?>
    name="bank">Bank Deposit</option>
</select>
    <br><br>
Postage Details: &nbsp;
<select name="postage">
    <option value="Pickup" <?php if(isset($_POST['postage']) && $_POST['postage'] == 'Pickup') echo "selected"; ?>
    name="pickup">Pick Up only</option>
    <option value="Post" <?php if(isset($_POST['postage']) && $_POST['postage'] == 'Post') echo "selected"; ?>
    name="post">Postage available at buyer's expense</option>
</select>
    <br><br>
<input type="submit" name="submit" value="Submit">
</form>
</div>
</body>
</html>

SELL_YOUR_ITEM.PHP：

<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Sell Your Item</title>
</head>

<body>
<?php

// Maximum file size for the html upload form
$max_file_size = 50 * 1024 * 1024; // size in bytes

// The directory that will recieve the uploaded file
$dir = 'uploads/';

// Determine connection variables
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "ictdbs504";

// Create Connection 
$conn = new mysqli($servername, $username, $password, $dbname);

// Check Connection 
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} 

// Escape user inputs for security
$sellingFormat = mysqli_real_escape_string($conn, $_POST['auction_type']);
$category = mysqli_real_escape_string($conn, $_REQUEST['category']);
$title = mysqli_real_escape_string($conn, $_REQUEST['title']);
$description = mysqli_real_escape_string($conn, $_REQUEST['description']);
$startPrice = mysqli_real_escape_string($conn, $_REQUEST['price']);
$duration = mysqli_real_escape_string($conn, $_REQUEST['duration']);
$quantity = mysqli_real_escape_string($conn, $_REQUEST['quantity']);
$location = mysqli_real_escape_string($conn, $_REQUEST['location']);
$paymentType = mysqli_real_escape_string($conn, $_REQUEST['paymentType']);
$postageDetails = mysqli_real_escape_string($conn, $_REQUEST['postage']);


//variables for images
$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["picture"]["name"]);
$extension = end($temp);


$success = false;



// Check if form submitted
if(isset($_POST['submit'])) {
    if (strlen($title)>0 && strlen($description)>0) {
            $newFilePath = $dir . "/" . $title . "." . $extension;
            move_uploaded_file($_FILES['picture']['tmp_name'], $newFilePath);


            // Query database and insert data into item table
            $itemQry = 'INSERT INTO items (title, picture, startPrice, category, description, quantity, location, sellingFormat, duration, paymentType, postageDetails)
                        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)';
            $statement = $conn->prepare($itemQry);
            $statement->bind_param('sssssssssss', $title, $newFilePath, $startPrice, $category, $description, $quantity, $location, $sellingFormat, $duration, $paymentType, $postageDetails);
            $statement->execute();

            $success=true;

    }}          
            // If successful, redirect to this page
        if($success == true){
            header('Location: list_items.php');
            die(); }



?>
</body>
</html>

我收到的错误：

注意：未定义索引：第 32 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的拍卖类型

注意：未定义索引：第 33 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的类别

注意：未定义索引：第 34 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的标题

注意：未定义索引：第 35 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的描述

注意：未定义索引：第 36 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的价格

注意：未定义的索引：第 37 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的持续时间

注意：未定义索引：第 38 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的数量

注意：未定义索引：第 39 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的位置

注意：未定义索引：第 40 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的 paymentType

注意：未定义索引：第 41 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的邮资

注意：未定义索引：第 46 行 /Applications/XAMPP/xamppfiles/htdocs/ICTDBS504/sell_your_item.php 中的图片

请帮忙！

【问题讨论】：

PHP: "Notice: Undefined variable", "Notice: Undefined index", and "Notice: Undefined offset"的可能重复
这在任何浏览器中都是相同的结果。当您将表单发送给自身时，数据位于 post 数组中。当您然后重定向到另一个页面时，它就消失了。此外，测试输入功能大多是无用的，不应该那样使用

标签： php html

【解决方案1】：

您可以将数据直接发布到 sell_your_item.php 而不是将其发布到同一页面并执行所有检查并保存数据以使其正常工作。目前您只是重定向到一个页面但数据不会传递到页面。

【讨论】：

谢谢，我试试看。