<?php
session_start();
define( “USERNAME”, “john” );
define( “PASSWORD”, “secret” );
if ( isset( $_POST[“login”] ) ) {
login();
} elseif ( isset( $_GET[“action”] ) and $_GET[“action”] == “logout” ) {
logout();
} elseif ( isset( $_SESSION[“username”] ) ) {
displayPage();
} else {
displayLoginForm();
}
function login() {
if (isset( $_POST[“username”] ) and isset( $_POST[“password”] ) ) {
if ($_POST[“username”] == USERNAME and $_POST[“password”] == PASSWORD ) {
$_SESSION[“username”] = USERNAME;
session_write_close();
header ('Location: login.php');
} else {
displayLoginForm ('Sorry, that username/password could not be found. Please try again.');
}
}
}
function logout()
{
unset( $_SESSION[“username”] );
session_write_close();
header('Location: login.php');
}
function displayPage()
{
displayPageHeader();
?>
<p> Welcome, < strong > <?php echo $_SESSION[“username”] ?>
</strong > ! You are currently logged in. < /p >
<p> <a href=”login.php?action=logout”> Logout </a> </p>
<?php
}
function displayLoginForm( $message=”” ) {
displayPageHeader();
?>
<?php
if($message) echo ‘(p class=”error”)’ $message ‘</p>’;
?>
<form action=”login.php” method=”post” >
<div style=”width: 30em;” >
<label for=”username” > Username < /label >
<input type=”text” name=”username” id=”username” value=”” / >
<label for=”password” > Password < /label >
<input type=”password” name=”password” id=”password” value=”” / >
<div style=”clear: both;” >
<input type=”submit” name=”login” value=”Login” / >
</div >
</div >
</form >
<?php
}
function displayPageHeader() {
?>
< !DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Strict//EN”
“http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd” >
<html xmlns=”http://www.w3.org/1999/xhtml” xml:lang=”en” lang=”en” >
<head>
<title> A login/logout system < /title >
<link rel=”stylesheet” type=”text/css” href=”common.css” />
<style type=”text/css” >
.error { background: #d33; color: white; padding: 0.2em; }
</style >
< /head >
</html>
<h1 > A login/logout system < /h1 >
<?php
}
?>
getting error at line 45 can any one tell whats wrong in it
