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<?phpsession_start();
 if (isset($_SESSION["email"])) {
 $username = $_SESSION["email"];
 session_write_close();
 } else {
 session_unset();
 session_write_close();
 $url = "login.php";
 header("Location: $url");
 }
 ?>
 <html>
 <head>
 <title>Criando CRUD com OOP</title>
 <link href="web/css/style.css" type="text/css" rel="stylesheet" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 </head>
 <body>
 <h2>Criando CRUD com OOP</h2>
 <div>
 <ul class="menu-list">
 <li><a href="index.php?action=estudante">Estudante</a></li>
 <li><a href="index.php?action=presenca">Presença</a></li>
 <li><?php echo $_SESSION["email"]; ?></li>
 <li><a href="index.php?action=sair">Sair</a></li>
 </ul>
 </div>
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