loggedinpage.php

<?php

    session_start();

    $diaryContent = "";

    if (array_key_exists("id", $_COOKIE)) {
        
        $_SESSION['id'] = $_COOKIE['id'];
        
    }

    if (array_key_exists("id", $_SESSION) && $_SESSION['id']) {
        
        

        include("connection.php");

        $query = "SELECT diary FROM `users` WHERE id = ".mysqli_real_escape_string($link, $_SESSION['id'])." LIMIT 1";
      $row = mysqli_fetch_array(mysqli_query($link, $query));
 
      $diaryContent = $row['diary'];
        
    } else {
        
        header("Location: index.php");
        
    }

    include("header.php");
    
 ?>


 	<nav class="navbar navbar-expand-lg navbar-light bg-light navbar-fixed-top" id="navbar">
	  <a class="navbar-brand" href="#"><span class="title21">Secret </span><i class="fas fa-user-secret"></i><span class="title31"> Diary</span></a>
	 
	    <div class="form-inline my-2 my-lg-0">
	      <a href='index.php?logout=1'><button class="btn btn-outline-success my-2 my-sm-0">Logout</button></a>
	    </div>
	  
	</nav>

 	<div class="container-fluid">

 		<textarea id="diary" class="form-control" style="height: 570px;"><?php echo $diaryContent; ?></textarea>
 		

 	</div>



<?php

    include("footer.php");


?>