我正在编写一些代码,通过以下代码与phpmyadmin上的登录数据库进行交互。
但是,我收到以下错误,它没有指定错误发生在哪一行。它已经困扰了我3天,我的研究没有导致任何解决方案。以防万一:SQLSTATE [HY093]:参数号无效:参数未定义
有人可以帮我解决问题吗?
提前谢谢。
<?php
session_start();
$user_name = "test" ;
$user_password = "test";
/* Login to database */
$DB_name = "adaming_login_db";
$DB_user = "root";
$DB_pass = "";
$DB_host = "localhost";
try
{
$DB_con = new PDO("mysql:host={$DB_host};dbname={$DB_name}",$DB_user,$DB_pass);
$DB_con->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
echo $e->getMessage();
}
class USER
{
private $db;
public function __construct($DB_con)
{
$this->db = $DB_con;
}
public function login($user_name,$user_password)
{
try
{
$stmt = $this->db->prepare("SELECT * FROM login_info WHERE user_name = :$user_name AND user_password = :$user_password");
$stmt->execute(array(':user_name'=>$user_name, ':user_password'=>$user_password));
$userRow=$stmt->fetch(PDO::FETCH_ASSOC);
if($stmt->rowCount() > 0)
{
if($user_password == $userRow['user_password'] && $user_name == $userRow['user_name'] )
{
$_SESSION['user_session'] = $userRow['user_id'];
echo "Success";
return true;
}
else
{
echo "Failed";
return false;
}
}
}
catch(PDOException $e)
{
echo $e->getMessage();
}
}
}
$user = new USER($DB_con);
$user->login($user_name,$user_password);
?>
答案 0 :(得分:0)
您需要从查询中删除美元符号。变化:
$stmt = $this->db->prepare("SELECT * FROM login_info WHERE user_name = :$user_name AND user_password = :$user_password");
到
$stmt = $this->db->prepare("SELECT * FROM login_info WHERE user_name = :user_name AND user_password = :user_password");