更改密碼不起作用php

Question

你能幫我看看我的代碼有什么問題嗎？ 我似乎無法找到錯誤。 我的問題是新密碼沒有保存在我的數據庫中。 我無法使用新密碼登錄。

這是我的php代碼。

<?php
session_start();
$uid = $_SESSION["uid"];

if($uid)
{
   //user is logged in
   if(isset($_POST["changepwbtn"]))
   {
       // check fields 
       $oldpw = $_POST['old_pw'];
       $newpw = $_POST['new_pw'];
       $renewpw = $_POST['c_npw'];

       //check pw db      
       $sql = "SELECT pazzword FROM customer_info where user_id = '$uid'";
       $run_query = mysqli_query($con,$sql);
       $row = mysqli_fetch_array($run_query);   
       $oldpwdb = $row['pazzword'];

       //check pw   
       if($oldpw==$oldpwdb)
       {       
            //check two new pw
            if($newpw==$renewpw)
            {    
                $query_change = mysql_query("UPDATE customer_info SET pazzword = '$newpw' WHERE user_id = '$uid'");
                session_destroy();
                die("Your password has been changed! <a href='index.php'>Return</a>");    
            }
            else
                die("New passwords doesn`t match!");              
       }
       else
           die("Old password doesn`t match");
   }
   echo"  ";    
}
else
    die("You need to log in!");
?>

Answer 1

您必須將連接對象傳遞給mysqli_query

$query_change = mysqli_query($con, "UPDATE customer_info SET pazzword = '$newpw' WHERE user_id = '$uid'");