mysqli 查询需要门户中的 2 个参数

Question

我使用以下代码时遇到错误:

if($_POST['cmdLogin']=="Login")
{
    $txtUsername= $_POST['txtUsername'];
    $txtPassword= $_POST['txtPassword'];
    $database = "triumph";  
    //  Database Server Connection
    $link=mysqli_connect("localhost","triumph","xxxx" );
    if(!link)
    {
        echo "Database connection error";
    }
    else
    {
        mysqli_select_db($link, $database);
    }

    $query="SELECT std_uname,std_pwd,std_status, login_state FROM user_regd where std_uname='$txtUsername'and std_pwd ='$txtPassword'";
    $result=mysqli_query($query);

错误是:

Warning: mysqli_query() expects at least 2 parameters, 1 given in /home/triumph/xxxx/xxxx

不确定这里可能的解决方案是什么。有人可以帮忙吗？

Answer 1

use 
$result=mysqli_query($link,$query);