Question

因为我使用PHP连接到mysql数据库。我试图连接到数据库，同样我想在我单击表单上的登录按钮时将数据插入数据库。但是当我尝试这个代码时，没有显示db的更改，所以请任何帮助。谢谢..

<?php
        $servername = "localhost"; 
        $username = "root";
        $password = "password";
        $conn = new PDO("mysql:host=$servername;dbname=Akalpa", $username, $password); // connection to my sql database

        if(isset($_POST['Log In'])){
            $username=$_POST['username'];
            $query = "Insert into User(username) values('$username')"; //query to insert to db

            if (mysql_query($query)) //checking the query 
            {
                echo"<h3>Inserted Successfully</h3>";   //value inserted to db successfully           
            }       


        }
    ?>

Answer 1

看起来好像在进行PDO连接，但使用的是mysql_函数。您应该将代码写成这样的代码。

<?php
        $servername = "localhost"; 
        $username = "root";
        $password = "password";
        $conn = new PDO("mysql:host=$servername;dbname=Akalpa", $username, $password); // connection to my sql database

    if(isset($_POST['Log In'])){
        $username=$_POST['username'];
        $query = "INSERT INTO User(username) VALUES(:username)"; //query to insert to db
        $stmt = $conn->prepare($query);
        $result = $stmt->execute(["username"=>$username]);
        if ($result) //checking the query 
        {
            echo"<h3>Inserted Successfully</h3>";   //value inserted to db successfully           
        } else {
            die("query failed");
        }       


    }
?>

您的原始代码容易受到SQL注入，这并不好。我也不会推荐使用$ _POST [“Log In”]，因为在数组键中包含空格是一种可怕的做法。尝试更简单的东西，例如“提交”或“登录”。

使用php连接和插入Mysql数据库

1 个答案: