如何让这个 php 代码连接到 sql 工作台？ [复制]

Posted 2023-02-24

【中文标题】如何让这个 php 代码连接到 sql 工作台？ [复制]

【英文标题】：How do I make this php code connect to sql workbench? [duplicate]

【发布时间】：2020-03-23 15:37:14

【问题描述】：

我在使用 pdo 连接到 Sql Workbench 时遇到问题。显示以下错误，尽管我已经尝试了各种连接方式。

得到一个错误：

SQLSTATE[HY000] [1045] 用户 'root'@'localhost' 的访问被拒绝 （使用密码：否）

<?php
session_start();
try 
$con = new PDO ("mysql:host=localhost;dbname=users",'root','');
if(isset($_POST['signup']))
    $username = $_POST['username'];
    $email = $_POST['email'];
    $password = $_POST['password'];
    $fname = $_POST['fname'];
    $lname = $_POST['lname'];
    $city = $_POST['city'];

    $insert = $con->prepare("INSERT INTO users1(username,email,password,fname,lname,city)
            values(:username, :email, :password, :fname, :lname, :city)
            ");
    $insert->bindParam (':username',$username);
    $insert->bindParam (':email',$email);
    $insert->bindParam (':password',$password);
    $insert->bindParam (':fname',$fname);
    $insert->bindParam (':lname',$lname);
    $insert->bindParam (':city',$city);
    $insert->execute();
elseif (isset($_POST['signin']))
    $username = $_POST['username'];
    $password = $_POST['password'];

    $select = $con->prepare("SELECT*FROM users1 where username='$username' and password='$password'");
    $select->setFetchMode(PDO::FETCH_ASSOC);
    $select->execute();
    $data=$select->fetch();
    if($data['username']!=$username and $data['password']!=$password)
    
        echo "Invalid username or Password";
    
    elseif($data['username']==$username and $data['password']==$password)
    
        $_SESSION['username']=$data['username'];
        $_SESSION['email']=$data['email'];
        $_SESSION['fname']=$data['fname'];
        $_SESSION['lname']=$data['lname'];

        header("location:profile.php");
    
     

catch (PDOException $e)  
      echo "Error: ". $e -> getMessage();
?>

【参考方案1】：

我认为它要求输入密码

 $con = new PDO ("mysql:host=localhost;dbname=users",'root','your_password');

【参考方案2】：

如果您不知道密码，可以使用以下命令更新密码：

UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root';

//then connection will be:

$con = new PDO ("mysql:host=localhost;dbname=users",'root','MyNewPass');

谢谢，