登录错误我无法使用多个用户登录，而我的系统可以创建许多用户

Question

    <?php
    session_start();
    include("conn.php");
    $qry=mysql_query("Select * from tblru");
    $qry2=mysql_query("Select * from tbladmin");
    $credentials=mysql_fetch_array($qry);
    $credentials2=mysql_fetch_array($qry2);
    if(isset($_POST['login'])){

                    if($_POST['user']==$credentials["user"]){
                        if($_POST['pass']==$credentials["pass"]){   

                        $_SESSION['user']=1;
                        header("location:login.php");
                        exit();
                        }
                        else{
                            echo "<div style='position:absolute; right:230px; top:220px;'><b>WRONG PASSWORD<br>Re Input PASSWORD</b></div>";
                        }
                    }
                    else if($_POST['user']==$credentials2["useradmin"]){
                        if($_POST['pass']==$credentials2["pass"]){  

                        $_SESSION['user']=1;
                        header("location:adminlogin.php");
                        exit();
                        }
                        else{
                            echo "<div style='position:absolute; right:230px; top:220px;'><b>WRONG PASSWORD<br>Re Input PASSWORD</b></div>";
                        }
                    }
                    else{
                        echo "<div style='position:absolute; right:230px; top:220px;'><b>WRONG USERNAME<br>Re Input Username</b></div>";
                    }
    }
    ?>

以下是添加用户的php脚本：         

    if(isset($_POST['submit'])){
if($_POST['secret']=="060593"){

$user = $_POST['newuser'];
$pass = $_POST['newpass'];
$connect = mysql_connect("localhost","root","");

    if($connect){
            mysql_select_db("dbreserve",$connect);  
            $query = "INSERT INTO tblru (user,pass) VALUES (\"" . $user . "\",\"" . $pass . "\")";
            if(mysql_query($query)){
                echo "<div style='position:absolute; left:615px; top:645px;'><font color='#FFFFFF'><b>User Successfully Created</b></font></div>";
            } else {
                die ("Failed" . mysql_error()); 
            }
        } else {
                die ("Failed to connect to mysql: " . mysql_error());
    }
}
    }
    ?>

以下是添加注册用户的表单： sjdhgsadlgjasldgijsaldfjskldgsaodjfislahdflisdjf; asdjglisadf不要打扰我输入的内容我只是输入它我可以进行修改                                            密码：                                       新用户：                                                    新用户密码：                                                                               

Answer 1

<?php
session_start();
include("conn.php");
$qry=mysql_query("Select * from tblru");
$qry2=mysql_query("Select * from tbladmin");
$credentials=mysql_fetch_assoc($qry);
$credentials2=mysql_fetch_assoc($qry2);
while ($row = $credentials) {
    $user = $row['user'];
    $pass = $row['pass'];
}
if(isset($_POST['login'])){

                if($_POST['user']==$user){
                    if($_POST['pass']==$pass){   

                    $_SESSION['user']=1;
                    header("location:login.php");
                    exit();
                    }
                    else{
                        echo "<div style='position:absolute; right:230px; top:220px;'><b>WRONG PASSWORD<br>Re Input PASSWORD</b></div>";
                    }
                }
                else if($_POST['user']==$credentials2["useradmin"]){
                    if($_POST['pass']==$credentials2["pass"]){  

                    $_SESSION['user']=1;
                    header("location:adminlogin.php");
                    exit();
                    }
                    else{
                        echo "<div style='position:absolute; right:230px; top:220px;'><b>WRONG PASSWORD<br>Re Input PASSWORD</b></div>";
                    }
                }
                else{
                    echo "<div style='position:absolute; right:230px; top:220px;'><b>WRONG USERNAME<br>Re Input Username</b></div>";
                }
}
?>