Question

我正在学习pdo，并且尝试使用CRUD方法。我正在尝试使用pdo将数据插入数据库，但未插入。下面是我的代码

        <?php 
    $username = $_POST['username'];
$password = password_hash($_POST['password'], PASSWORD_BCRYPT ));
try {
    $query = $connect->prepare("INSERT INTO users(username, password) VALUES(?,?)");
        $query->execute(array($username, $password));
        echo "data";
    }
    catch (PDOException $event) {
        echo $event->getMessage();
    }
    ?>

我将此索引文件命名为index.php

<?php 
require_once 'db.php';
session_start();
session_regenerate_id();
?>
<!DOCTYPE html>
<html>
<head>
  <title>Sign-Up/Login Form</title>
</head>
<?php
if ($_SERVER['REQUEST_METHOD'] == '$_POST') {
    if (isset($_POST['login'])) {
        require 'login.php';
    }
    elseif (isset($_POST['register'])) {
        require 'register.php';
    }
}
?>
<body>
    <form action="index.php" method="POST">
        <input type="text" name="username">
        <input type="password" name="password">
        <input type="submit" name="register" value="Submit">
    </form>
</body>
</html>

我的db.php看起来像

<?php 
try {
$connect = new PDO('mysql:dbname=pdologin;host=localhost', 'root', '$$$$'); 
$connect->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (Exception $event) {
    $event->getMessage();

}
?>

Answer 1

问题是您的代码永远不会到达您的require脚本（login.php或register.php），因为您的条件不正确。

您有：if ($_SERVER['REQUEST_METHOD'] == '$_POST')

应为if ($_SERVER['REQUEST_METHOD'] == 'POST')

Answer 2

先连接

$connect = mysqli_connect("localhost","root","root","my_db");

然后在执行时删除参数

$query->execute();

尝试

   <?php 
    $connect = mysqli_connect("localhost","root","root","my_db");
    $username = $_POST['username'];
    $password = password_hash($_POST['password'], PASSWORD_BCRYPT );
    try {
        $query = $connect->prepare("INSERT INTO users(username, password) VALUES('$username', '$password')");
        $query->execute();
    }
    catch (PDOException $e) {
        echo $e->getMessage();
    }
    ?>

Answer 3

在学习或做一些需要连接的小脚本时，您将得到如下所示的结果，从长远来看，将这些东西包装在函数中或使用小型助手或框架可以使此操作变得容易一些。要学习的好主意，但无论您写多少年，它仍然是乏味的样板。

<?php
//db settings that are typically in a config somewhere
$db_servername = "localhost";
$db_username = "username for your database";
$db_password = "password for your database";
$db_name = "your_db_name";        

try {
    $connect = new PDO("mysql:host=$db_servername;dbname=$db_name, $db_username, $db_password");
    // set the PDO error mode to exception
    $connect->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    //echo "Connected successfully";
 }catch(PDOException $e){
    //echo "Connection failed: " . $e->getMessage();
 }
 $sth = $connect->prepare("INSERT INTO users(username, password) VALUES(:username,:password)");

 $username = $_POST['username'];
 $password = password_hash($_POST['password'], PASSWORD_BCRYPT );

 $sth->bindValue(':username', $username, PDO::PARAM_STR);
 $sth->bindValue(':password', $password, PDO::PARAM_STR);
 $sth->execute();

作为示例，我的团队现在仅编写数据库绑定代码，例如

<?php
//array of ids to insert
$binds['ids'] = array(1,3,4,5,6,7,9,08098);
//Database class is auto included with every script
$success = Database::query('insert into my_table (id) values(:ids)',$binds);

使用pdo时数据未插入数据库

3 个答案: