使用表单和 PDO 插入多行

Question

大家好，我被困在 PHP 代码中，无法使用表单和 PDO 插入多行 在我的代码下面请帮我修复它 我会感谢所有 cmets 和建议的解决方案 并原谅我的错误，因为我是 PHP 新手

HTML 代码

<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Firstname: <input type="text" name="firstname[]"><br>
Lastname: <input type="text" name="lastname[]"><br>
Email: <input type="text" name="email[]"><br>
<hr>
Firstname: <input type="text" name="firstname[]"><br>
Lastname: <input type="text" name="lastname[]"><br>
Email: <input type="text" name="email[]"><br>
<input type="submit" name="submit" value="Submit">
</form>

PHP 代码

<?php
$servername = "";
$username = "";
$password = "";
$dbname = "";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    if ($_SERVER["REQUEST_METHOD"] == "POST") {
        $firstname = input_checker($_POST["firstname"]);
        $lastname = input_checker($_POST["lastname"]);
        $email = input_checker($_POST["email"]);   

        foreach ($row as $rows) {
            // prepare sql and bind parameters
            $stmt = $conn->prepare("INSERT INTO memo (firstname, lastname, email) 
            VALUES (:firstname, :lastname, :email)");
            $stmt->bindParam(':firstname', $rows);
            $stmt->bindParam(':lastname', $rows);
            $stmt->bindParam(':email', $rows);
            $stmt->execute();

            echo "New records created successfully";
        }
    }
}
catch(PDOException $e) {
    echo "Error: " . $e->getMessage();
}
$conn = null;

function input_checker($data) {
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    return $data;
}
?>

Answer 1

请缩进，很难阅读。

它不能工作。 不要 FOREACH 查询。您将发送一个包含错误数据的查询，次数与 $rows 数组中的元素一样多

你在这里所做的是什么都不发送，因为 $rows 不存在。

所以这里是步骤。 做

$rows = array($firstname, $lastname, $email);
$stmt = $conn->prepare("INSERT INTO memo(ID, firstname, lastname, email) 
VALUES (NULL, :firstname, :lastname, :email)");
foreach($rows as $key => $value){
         $stmt->bindParam($key, $value);
}
$stmt -> execute();

或者您可以尝试以这种方式构建查询： DB_connect ：

<?php
    $db_username = "root";
    $db_password = "";
    $db_host = "localhost";
    $db_name = "veterinaires";
    /* PDO EN FR OU EN ARABE C ISSI */
    $db_options = array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8");

        try {
            $db = new PDO("mysql:host={$db_host};dbname={$db_name};charset=utf8", $db_username, $db_password, $db_options);
        } catch(PDOException $ex) {
            die("Failed to connect to the database: " . $ex->getMessage());
        }

    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
?>

查询：

        $query = "INSERT INTO patients
                    (ID,
                    pet_name,
                    breed,
                    colour,
                    sex,
                    date_of_birth,
                    microchip_tatoo,
                    comment,
                    owner_ID)
                VALUES
                    (NULL,
                    :pet_name,
                    :breed,
                    :colour,
                    :sex,
                    :date_of_birth,
                    :microchip_tatoo,
                    :comment,
                    :owner_ID)";
        $query_params = array(':pet_name' => $pet_name,
                              ':breed' => $breed,
                             ':colour' => $colour,
                             ':sex' => $sex,
                             ':date_of_birth' => $date_of_birth,
                             ':microchip_tatoo' => $microchip_tatoo,
                             ':comment' => $comment,
                             ':owner_ID' => $_SESSION['ID']);
        try {
            $stmt = $db->prepare($query);
            $result = $stmt->execute($query_params);
            $check = true;
        }catch(PDOException $ex){
            $check = false;
            die("Failed to run query: " . $ex->getMessage());
        }
?>