Question

每次填写表格时，系统会将数据两次插入表格？为什么会这样？

// This checks if variabes are not empty, and if username is less than 11 characters long.
if (!empty($username) && !empty($password) && !empty($message) && strlen($username) < 11) {

    // Shortcut for our ID generator function.
    $ID = generateID();

    // Now lets insert (register the account) these datas to our database.
    $insert = $connect->prepare(
    "INSERT INTO users ( 
        username, 
        password, 
        message, 
        `date`, 
        `time`, 
        id
    ) VALUES ( 
        :username, 
        :password, 
        :message, 
        CURDATE(), 
        CURTIME(), 
        :id 
    )");

    // Executing in array, because if we binded all these variables, it would look very bad.
    $insert->execute(array(
        ':username' => $username,       
        ':password' => $password, 
        ':message' => $message, 
        ':id' => $ID
    ));

    if (!$insert->execute()) {
        print_r($insert->errorInfo());
    }       
}
// Let's check if errors is not empty.
else if (!empty($errors)) 
{
    // Now let's use a loop to get all of the error messages set in the array.
    foreach ($errors as $error) {
        echo $error;
    }
}

我是PDO的新手，这是我第一次完成PDO连接，执行，查询。我没有看到任何错误？感谢。

生成ID功能

    $nums = substr(hash('sha512', '123456789'), 0, 20);
    $ID = str_shuffle($nums);
    return $ID;

HandleErrors功能

function handleErrors() {
    // Create new array to handle errors
    $errors = array();

    // Setting our errors

    // If username is empty, set error.
    if (empty($username)) {
        $errors[] = 'Username is empty';
    } 
    // If password is empty, set error.
    else if (empty($password)) 
    {
        $errors[] = 'Password is empty';
    } 
    // If username length is more than 11, set error.
    else if (strlen($username) > 11)
    {
        $errors[] = 'Your username is more than 11 characters long';
    }
}

其他：

<?php
require('inc/config.inc.php');
require('inc/session.inc.php');
include('inc/functions.inc.php');
?>

<html>
<h1>Recover</h1>
<br />


<form action="recover.php" method="POST">
    Your name: <input type="text" name="username"><br />
    Password for this recover: <input type="password" name="password"><br />
    Your Message: <input type="text" name="message"><br />
    <input type="submit" name="submit"><br />
</form>

<?php
    // Check if isset, also fixes the php notices error.
    if (isset($_POST['username']) && isset($_POST['password']) && isset($_POST['message'])) {
        // Created shortcuts for the POSTs we currently have.
        $username = $_POST['username'];
        $password = $_POST['password'];
        $message = $_POST['message'];
    }

    // Let's call our error handling function from functions.inc.php - before we doing the checking.

    handleErrors();

Answer 1

您正在调用insert-＆gt;执行两次：

$insert->execute(array(
    ':username' => $username,       
    ':password' => $password, 
    ':message' => $message, 
    ':id' => $ID
));

if (!$insert->execute()) {
    print_r($insert->errorInfo());
}

Answer 2

你执行了两次。

$insert->execute(array(...

和

if (!$insert->execute()) { ...

你想要的是

if( !$insert->execute(array(
    ':username' => $username,       
    ':password' => $password, 
    ':message' => $message, 
    ':id' => $ID)) ) {
        print_r($insert->errorInfo());
}

Answer 3

你正在执行两次，

1）检查erro使用Try Catch语句

2）或者你可以填充数组，然后在if（！$ insert-＆gt; execute（））中运行它。{..

3）您可以运行一次并检查数据库中的affected_rows，这将告诉您该命令是否已被执行。

PDO MySQL每次插入两次？

3 个答案: