Question

这是一个不同的问题，不重复，请不要标记为重复！

你好:)我传递从表单获得的用户输入。此表单有1到7的选项。如果用户选择1，他们会得到一个产品，他们输入一个名称，价格和数量。如果他们选择两个，他们输入两个产品的信息......等等......七，你输入七个产品的信息

一切都可以通过数据库。但是，仅在通过所有7个时才有效。如果您只输入一个产品信息集，则它不起作用。即使字段可以为“空”。

我需要使用$ product_1_name，$ product_1_price和$ product_1_quantity的一些指导。我需要让它们传递到数据库。当没有值传递给函数时，代码就会变得怪异。

我可以请一些帮助吗？

SQL SET UP CODE：

CREATE TABLE productevents (
    o_id int(11) not null AUTO_INCREMENT PRIMARY KEY,
    productid int(11),
    product_1_name varchar(256),
    product_1_price int(11),
    product_1_quantity int(11),

    product_2_name varchar(256),
    product_2_price int(11),
    product_2_quantity int(11),

    product_3_name varchar(256),
    product_3_price int(11),
    product_3_quantity int(11),

    product_4_name varchar(256),
    product_4_price int(11),
    product_4_quantity int(11),


    product_5_name varchar(256),
    product_5_price int(11),
    product_5_quantity int(11),

    product_6_name varchar(256),
    product_6_price int(11),
    product_6_quantity int(11),

    product_7_name varchar(256),
    product_7_price int(11),
    product_7_quantity int(11)





);

CODE：

if (isset($_POST['submit'])) {

    include_once 'dbh.inc.php';


    $a = 5;
    $productid = $a;


    $product_1_name = mysqli_real_escape_string($conn, $_POST['product_1_name']);   //uid
    $product_1_price = mysqli_real_escape_string($conn, $_POST['product_1_price']); //uid
    $product_1_quantity = mysqli_real_escape_string($conn, $_POST['product_1_quantity']);   //uid

    $product_2_name = mysqli_real_escape_string($conn, $_POST['product_2_name']);   //uid
    $product_2_price = mysqli_real_escape_string($conn, $_POST['product_2_price']); //uid
    $product_2_quantity = mysqli_real_escape_string($conn, $_POST['product_2_quantity']);   //ui3

    $product_3_name = mysqli_real_escape_string($conn, $_POST['product_3_name']);   //uid
    $product_3_price = mysqli_real_escape_string($conn, $_POST['product_3_price']); //uid
    $product_3_quantity = mysqli_real_escape_string($conn, $_POST['product_3_quantity']);   //uid

    $product_4_name = mysqli_real_escape_string($conn, $_POST['product_4_name']);   //uid
    $product_4_price = mysqli_real_escape_string($conn, $_POST['product_4_price']); //uid
    $product_4_quantity = mysqli_real_escape_string($conn, $_POST['product_4_quantity']);   //uid

    $product_5_name = mysqli_real_escape_string($conn, $_POST['product_5_name']);   //uid
    $product_5_price = mysqli_real_escape_string($conn, $_POST['product_5_price']); //uid
    $product_5_quantity = mysqli_real_escape_string($conn, $_POST['product_5_quantity']);   //uid

    $product_6_name = mysqli_real_escape_string($conn, $_POST['product_6_name']);   //uid
    $product_6_price = mysqli_real_escape_string($conn, $_POST['product_6_price']); //uid
    $product_6_quantity = mysqli_real_escape_string($conn, $_POST['product_6_quantity']);   //uid

    $product_7_name = mysqli_real_escape_string($conn, $_POST['product_7_name']);   //uid
    $product_7_price = mysqli_real_escape_string($conn, $_POST['product_7_price']); //uid
    $product_7_quantity = mysqli_real_escape_string($conn, $_POST['product_7_quantity']);   //uid



        $sql = "INSERT INTO productevents (productid, product_1_name, product_1_price, product_1_quantity, 
                            product_2_name, product_2_price, product_2_quantity, 
                            product_3_name, product_3_price, product_3_quantity, 
                            product_4_name, product_4_price, product_4_quantity, 
                            product_5_name, product_5_price, product_5_quantity, 
                            product_6_name, product_6_price, product_6_quantity, 
                            product_7_name, product_7_price, product_7_quantity) 
                            VALUES (
                            '$productid,'$product_1_name', '$product_1_price', '$product_1_quantity',
                            '$product_2_name', '$product_2_price', '$product_2_quantity', 
                            '$product_3_name', '$product_3_price', '$product_3_quantity', 
                            '$product_4_name', '$product_4_price', '$product_4_quantity',  
                            '$product_5_name', '$product_5_price', '$product_5_quantity', 
                            '$product_6_name', '$product_6_price', '$product_6_quantity', 
                            '$product_7_name', '$product_7_price', '$product_7_quantity' 

                            );";


        mysqli_query($conn, $sql);
        echo $sql;

        exit();

错误来自ECHO $ SQL：

Notice: Undefined index: product_3_name in test.php on line 29

Notice: Undefined index: product_3_price in test.php on line 30

Notice: Undefined index: product_3_quantity in test.php on line 31

Notice: Undefined index: product_4_name in test.php on line 33

Notice: Undefined index: product_4_price in test.php on line 34

Notice: Undefined index: product_4_quantity in test.php on line 35

Notice: Undefined index: product_5_name in test.php on line 37

Notice: Undefined index: product_5_price in test.php on line 38

Notice: Undefined index: product_5_quantity in test.php on line 39

Notice: Undefined index: product_6_name in test.php on line 41

Notice: Undefined index: product_6_price in test.php on line 42

Notice: Undefined index: product_6_quantity in test.php on line 43

Notice: Undefined index: product_7_name in test.php on line 45

Notice: Undefined index: product_7_price in test.php on line 46

Notice: Undefined index: product_7_quantity in test.php on line 47
INSERT INTO productevents (productid, product_1_name, product_1_price, product_1_quantity, product_2_name, product_2_price, product_2_quantity, product_3_name, product_3_price, product_3_quantity, product_4_name, product_4_price, product_4_quantity, product_5_name, product_5_price, product_5_quantity, product_6_name, product_6_price, product_6_quantity, product_7_name, product_7_price, product_7_quantity) VALUES ( '5','product1', '1', '1', 'product2', '2', '2', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '' );

Answer 1

您应该在每个变量赋值之前添加if (isset($_POST['product_1_name']))，以检查该值是否为空。

这样的事情：

$product_1_name = '';
if (isset($_POST['product_1_name'])) {
    $product_1_name = mysqli_real_escape_string($conn, $_POST['product_1_name']);
}

将值添加到sql表

1 个答案: