尝试使用 PHP Header(“Location:”) 函数进行重定向

Question

我在这件事上跌跌撞撞地走出了困境。我无法让此代码在提交创建产品后立即将用户重定向到其产品页面。我有三个文件 create_product.php |产品.php | &我正在从中调用函数的外部函数页面。我似乎无法开始工作的是： header("location:product.php?product_id='.$product_id.'");功能。所有内容都正确输入到数据库中，但是当用户单击“提交”来创建产品时，我收到“该产品不存在”错误。任何帮助将不胜感激（我知道存在安全问题等......目前不担心这些问题，而只是获取“创建产品提交按钮以将用户重定向到新创建的产品页面......” 并且对低响应率感到抱歉（作为新用户已经引起我的注意......我将开始接受所有答案）

.

<?php
if (isset($_POST['product_name'], $_POST['product_description'], $_FILES['fileField'])) {
$product_name = $_POST['product_name'];
$product_description = $_POST['product_description'];
$image_name = $_FILES['fileField']['name'];
$image_size = $_FILES['fileField']['size'];
$image_temp = $_FILES['fileField']['tmp_name'];

$allowed_ext = array('jpg', 'jpeg', 'png', 'gif');
$image_ext = strtolower(end(explode('.', $image_name)));

$errors = array();

if (empty($product_name) || empty($product_description) || empty($image_name)) {
    $errors[] = "All Fields are required";
} else {
    if (strlen($product_name) > 55 || strlen($product_description) > 255) {
        $errors[] = "One or more fields contains too many characters";
    } else {
        if (in_array($image_ext, $allowed_ext) === false) {
            $errors[] = 'File type not allowed';
        }
        if ($image_size > 2097152) {
            $errors[] = 'Maximum file size is 2MB';
        }

    }

}

if (!empty($errors)) {
    foreach ($errors as $error) {
        echo $error, '<br/>';
        }
    } else {
        create_product($product_name, $product_description, $image_temp, $image_ext);

        header("location: product.php?product_id='.$product_id.'");
        exit();
    }
}
 ?>

。

<?php
// check to see the url variable product_id is set
if (isset($_GET['product_id'])) {
    $product_id = preg_replace('#[^0-9]#i','',$_GET['product_id']);
    // use this variable to check to see if this product ID exists...
    // if yes then get details...
    // if no then exit this script and give error

    $sql = mysql_query("SELECT * FROM products WHERE product_id = '$product_id' LIMIT 1");
    $productCount = mysql_num_rows($sql); // count the output
    if ($productCount > 0) {
        // get all the product details
        while($row = mysql_fetch_array($sql)) {
            $member_id = $row['member_id'];
            $timestamp = strftime("%b %d %Y", strtotime($row['timestamp']));
            $prodtitle = $row['bmtitle'];
            $proddesc = $row['bmdesc'];
        }

    } else {
        echo "That product does not exist";
        exit();
    }

} else {
    echo "Need data - product id needed to render this page is missing.";
    exit();
}

?>

然后我继续在这个product.php页面中回显 最后包含的产品函数

页面：（仅显示 create_product 函数）：

<?php

function create_product($product_name, $product_description, $image_temp, $image_ext) {
$product_name = mysql_real_escape_string(htmlentities($product_name));
$product_description = mysql_real_escape_string(htmlentities($product_description));

mysql_query("INSERT INTO products (product_id, member_id, timestamp, prodtitle, proddesc, image_temp, image_ext) VALUES ('','".$_SESSION['member_id']."', UNIX_TIMESTAMP(), '$product_name', '$product_description', '$image_temp', '$image_ext')");

mkdir('uploads/'.mysql_insert_id(), 0777);
mkdir('uploads/thumbs/'.mysql_insert_id(), 0777);

// place image & thumbnail in the respective folder
$bmid = mysql_insert_id();
$image_file = "$bmid."."jpg";
$location = "uploads/$bmid/$image_file";
move_uploaded_file($_FILES['fileField']['tmp_name'],$location);

create_thumb('uploads/'.$bmid.'/', $image_file, 'uploads/thumbs/'.$bmid.'/');

}
?>

Answer 1

此行是错误的：

header("location: product.php?product_id='.$product_id.'");

应该如下所示：

header("Location: product.php?product_id=$product_id");

请注意缺少单引号。

此外，您似乎根本没有在 CREATE_PRODUCT.PHP 中定义 $product_id var

Answer 2

我没有看到您在任何地方定义 $product_id 。错误页面的 URL product.php?product_id= 是否有可能在 = 后面没有任何内容？

Answer 3

您应该对位置 uri 使用绝对路径。您还需要确保在发送标头之前没有其他输出发送到客户端。

来自 http://php.net/manual/en/function.header.php 的相关片段

<?php
/* Redirect to a different page in the current directory that was requested */
$host  = $_SERVER['HTTP_HOST'];
$uri   = rtrim(dirname($_SERVER['PHP_SELF']), '/\\');
$extra = 'mypage.php';
header("Location: http://$host$uri/$extra");
exit;
?>