Question

[TLDR] 我想从我的网站托管服务提供的mySQL数据库中输入从每行数据到我网站目录中的单独文件的输出，该文件可以通过物理，打印的二维码 [TLDR]

我想采取一定数量的物理打印QR码（20到30），将它们链接到我网站的文件。（例如：QR码----＆gt; mywebsite.comli.com/file1）并且能够从mySQL数据库向这些多个文件添加信息，并且还具有从这些数据库中删除数据的功能，同时我删除，发送电子邮件到已删除的文件内的电子邮件。

我无法想到一种从数据库中获取数据并将其“放入”每个文件的方法。我可以使用重定向运算符（＆gt;，＆gt;＆gt;）将数据库的输出替换或附加到多个文件中吗？但我总是被困在如何准确地引用每个可能的文件。可以注册。表达发挥作用？

我真的不是一个程序员，所以我不得不从网上来源复制大部分代码。可能有很多基本错误/安全问题，但我想知道我是否可以获得一般工作，然后再解决这些问题。

这是我的mail_handler.php文件的代码，该文件也连接到数据库并打印出echo语句中的内容，但只打印到同一个文件中。

<?php
session_start();

if(isset($_POST['submit'])){
    $to = "email@example.com"; // this is your Email address
    $from = $_POST['email']; // this is the sender's Email address
    $first_name = $_POST['first_name'];
    $last_name = $_POST['last_name'];
    $subject = "Form submission";
    $subject2 = "Copy of your form submission";
    $message = $first_name . " " . $last_name . " wrote the following:" . "\n\n" . $_POST['message'];
    $message2 = "Here is a copy of your message " . $first_name . "\n\n" . $_POST['message'];

    $headers = "From:" . $from;
    $headers2 = "From:" . $to;
    mail($to,$subject,$message,$headers);
    mail($from,$subject2,$message2,$headers2); // sends a copy of the message to the sender
    echo "Mail Sent. Thank you " . $first_name . ", we will contact you shortly.";
    // You can also use header('Location: thank_you.php'); to redirect to another page.
    // You cannot use header and echo together. It's one or the other.
    }

$servername = "mywebhost.com";
$username = "username";
$password = "password";
$dbname = "mydb";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}
else {
    echo "Succcccessssful concection \n\n";
}

// sql to create table
$sql = "CREATE TABLE MyGuests (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, 
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),

reg_date TIMESTAMP
)";

if (mysqli_query($conn, $sql)) {
    echo "Table MyGuests created successfully";
} else {
    echo "Error creating table: " . mysqli_error($conn);
}


$sql = "INSERT INTO MyGuests (firstname, lastname, email, message)
VALUES ('$first_name', '$last_name', '$from', '$message')";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully ";

} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}


// sql for dispplayying info
$sql = "SELECT id, firstname, lastname, email, message FROM MyGuests";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "id:" . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "- email " . $row["email"]. " -message " . $row["message"]. "<br>";
    }
} else {
    echo "0 results";
}




mysqli_close($conn);
?>

这是我的index.php文件的代码

<!DOCTYPE html>
<head>
<title>Form Plant submission</title>
</head>
<body>

<form action="mail_handler.php" method="post">
First Name: <input type="text" name="first_name"><br>
Last Name: <input type="text" name="last_name"><br>
Email: <input type="text" name="email"><br>
Message:<br><textarea rows="5" name="message" cols="30"></textarea><br>
<input type="submit" name="submit" value="Submit">
</form>

</body>
</html>

二维码和文件？

0 个答案: