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<?php
  //Require
  require("config.inc.php");

  //Check to see if the user's loged in.
  if($QUERY_STRING=='login'){process();}
    elseif(empty($HTTP_COOKIE_VARS['username'])){login();}
    elseif($QUERY_STRING=='logout'){logout();}
  else{loggedin();}

//Login Page
function login() {
  global $PHP_SELF;

  $tbl_data = style_settings();

  load_top();

 ?>
  <center>
  <font face="<? echo $tbl_data['font'] ?>" size="2">
  <form action="<? echo "$PHP_SELF?login"; ?>" method=POST>
  Username:<br><input type=text name=username><br>
  Password:<br><input type=password name=password><br>
  <input type=submit value="Login">
  </form>
  </font>
  </center>
   <?php

  load_bottom();
}

//Do the login
function process() {
    global $username,$password,$tables;

    $password=md5($password);

    $result=mysql_query("SELECT * FROM $tables[user] WHERE username='$username' AND password='$password'");
    $number=mysql_numrows($result);

    if($number!=1){log_error("Bad Username or Password");}

    $lifetime = time() + 86400 * 356;

    setcookie("username",$username, $lifetime);
    setcookie("user_id",mysql_result($result,0,"id"), $lifetime);

    header("Location: index.php?top_message=Logged In");
}

//Logout User
function logout() {
    setcookie("username");
    setcookie("user_id");

    header("Location: index.php?top_message=Logged Out");
}

//Logged In Function
function loggedin() {
    load_top();
        print_text("You are already logged in.<br><a href=\"log.php?logout\">Click Here to Log Out</a>");
    load_bottom();
}

//Error for Login
function log_error($text) {
    load_top();
      print_text($text);
    load_bottom();
    exit;
}

?>

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$username = ( isset($_POST['username']) ) ? $_POST['username'] : $_GET['username'];
$password = ( isset($_POST['password']) ) ? $_POST['password'] : $_GET['password'];

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echo "Query String: $QUERY_STRING\n";
echo "username: $_POSR['username']\n";