index.html

<?php
session_start();
$loginok = false;
$loginid = "";
if( isset($_SESSION['userid']) ){
    $loginid = $_SESSION['userid'];
}
if( $loginid ) $loginok = true;
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>My Blog</title>
    <link rel="stylesheet" href="/blog/css/bootstrap.min.css">
    <link rel="stylesheet" href="/blog/js/ui/jquery-ui.min.css">
    <script src="/blog/js/ui/external/jquery/jquery.js"></script>
    <script src="/blog/js/ui/jquery-ui.min.js"></script>
</head>
<body>
    <div class="container">
        <div class="jumbotron">
            <h1>유승열의 블로그</h1>
            <p>PHP + MySql + HTML + CSS + JavaScript + jQuery + Bootstrap...</p>
            <a href="/blog/" class="btn btn-info"><span class="glyphicon glyphicon-home"></span> HOME</a>
            <?php if( ! $loginok ):?>
            <a href="/blog/pages/login.php" class="btn btn-primary"><span class="glyphicon glyphicon-log-in"></span> 로그인</a>
            <a href="/blog/pages/join.php" class="btn btn-success"><span class="glyphicon glyphicon-user"></span> 회원가입</a>
            <?php else: ?>
            <a href="/blog/pages/logout.php" class="btn btn-warning"><span class="glyphicon glyphicon-log-out"></span> <?php echo $loginid;?>님 로그아웃</a>
            <?php endif ?>
        </div>
        <div class="content">
            <!-- content start -->