Login แบบ นี้พอมีตัวอย่างใหม ครับ ช่วย ที อยากทำ login แบบ ให้ ผู้ช้เลือก จำ username password อ่ะครับ

<?php
$do = isset($_GET["do"])?$_GET["do"]:""; 

		$do = strtolower($do); 
		
			if (checkLoggedin()) 
    		{ 
        		require"showuser.php"; 
   			} 
    		else 
    		{ 				
				require"loginpanel.php";
			}
?>

<?php
<form method="POST" action="login.php?do=login">						
	<table class="LOGINTB">
	  <tr>	 									
		<td align="center" colspan="2" class="TBLHEAD">
		  <font class="LOGINHD">
            <?php echo "LOGIN"; ?>
          </font>
        </td>
      </tr>
      <tr>	 									
		<td>&nbsp;</td>
      </tr>
      <tr>
        <td colspan="1" class="TBLDATA">
          <font class="TBLDATA">
            <?php echo "USERNAME"; ?>
          </font>
        </td>
        <td colspan="1" class="TBLDATA">
          <font class="TBLDATA">
            <input type="text" size="8" name="uname">
          </font>
        </td>
      </tr>
      <tr>
        <td colspan="1" class="TBLDATA">
          <font class="TBLDATA">
            <?php echo "PASSWORD"; ?>
          </font>
        </td>
        <td colspan="1" class="TBLDATA">
          <font class="TBLDATA">
            <input type="password" size="8" name="pword">
          </font>
        </td>
      </tr>
      <tr>
        <td align="center" colspan="2" class="LOGINRW">
          <font class="LOGINRW">
            <input type="submit" name="logon" value="LOG IN">
          </font>
        </td>
      </tr>
      <tr> 
            <td colspan="2" align="center"><input type="CHECKBOX" name="remme">&nbsp;Remember me for the next time I visit</td> 
        </tr>
      <tr>
</table>
</form>
?>

<?php
$do = isset($_GET["do"])?$_GET["do"]:""; 

		$do = strtolower($do); 
		
		switch($do) 
		{ 
			case "":
		
			if (checkLoggedin()) 
    		{ 
        		require"showuser.php"; 
   			} 
    		else 
    		{ 				
				require"loginpanel.php";
			}
			break;
			case "login": 
    			$username = isset($_POST["uname"])?$_POST["uname"]:""; 
    			$password = isset($_POST["pword"])?$_POST["pword"]:""; 

    				if ($username=="" or $password=="" ) 
    					{ 
        					echo "<h1>Username or password is blank</h1>"; 
       						 clearsessionscookies(); 
        						header("location: index.php"); 
    					} 
    				else 
    					{ 
        					if(confirmuser($username,$password)) // As pointed out by asgard2005 
        						{ 
            						createsessions($username,$password); 
            						 
                					header("location: index.php"); 
             
            					} 
         
        					else 
        						{ 
            						echo "<h1>Invalid Username and/Or password</h1>"; 
            						clearsessionscookies(); 
            						header("location: index.php"); 
        						} 
    					} 
    				break; 
			case "logout": 
    			clearsessionscookies(); 
    			header("location: index.php"); 
    			break; 
		}
?>

<?php
function createsessions($username,$password) 
{ 
    //Add additional member to Session array as per requirement 
    session_register(); 

    $_SESSION["gdusername"] = $username; 
    $_SESSION["gdpassword"] = $password; 
     
    if(isset($_POST['remme'])) 
    { 
        //Add additional member to cookie array as per requirement 
        setcookie("gdusername", $_SESSION['gdusername'], time()+60*60*24*100, "/"); 
        setcookie("gdpassword", $_SESSION['gdpassword'], time()+60*60*24*100, "/"); 
        return; 
    } 
} 

function clearsessionscookies() 
{ 
    unset($_SESSION['gdusername']); 
    unset($_SESSION['gdpassword']); 
     
    session_unset();     
    session_destroy();  

    setcookie ("gdusername", "",time()-60*60*24*100, "/"); 
    setcookie ("gdpassword", "",time()-60*60*24*100, "/"); 
} 

function confirmUser($username,$password) 
{ 
	global $User,$test;
	
	
	$User->loggedIn=FALSE;
	$User->usertype=1;
	
    connectdb();
    
    $query = "SELECT * FROM userdata WHERE username=\"$username\"";
    $result=mysql_query($query)
    or die(mysql_error());
    
    if($userline=mysql_fetch_array($result,MYSQL_ASSOC))
    	{
    		if($password==$userline["password"])
     		{
    			$User->userid=$userline["userid"];
    			$User->username=stripslashes($username);
    			$User->emailaddr=$userline["email"];
    			$User->createdate=$userline["since"];
    			$User->usertype=$userline["usertype"];
    			$User->loggedIn=TRUE;
    		    $test=$userline["password"];
       				
				return true;
				}
    		else
    			{
				return false;    			
    			}
    	}
    
    	
} 

function checkLoggedin() 
{ 
    if(isset($_SESSION['gdusername']) AND isset($_SESSION['gdpassword'])) 
        return true; 
    elseif(isset($_COOKIE['gdusername']) && isset($_COOKIE['gdpassword'])) 
    { 
        if(confirmUser($_COOKIE['gdusername'],$_COOKIE['gdpassword'])) 
        { 
            createsessions($_COOKIE['gdusername'],$_COOKIE['gdpassword']); 
            return true; 
        } 
        else 
        { 
            clearsessionscookies(); 
            return false; 
        } 
    } 
    else 
        return false; 
}

function connectdb()
{
$conn=mysql_connect("localhost","root","ragnarok")
	or die(mysql_error());
$db=mysql_select_db("zeanpredict")
	or die(mysql_error());
}
?>