如何在 HTML 页面中显示 PHP session 变量？

Question

How can I display a PHP session variable in an html file? I am redirecting users to random html pages without repetition, and for each page they see I would like the page number to increase by 1. I've started a session on the PHP file that succeeds the first HTML page and I have this PHP session variable:

if(!isset($_SESSION[$pagenum]))
{
    //New user
    $_SESSION[$pagenum] = 1;   
}

$_SESSION[$pagenum]++; 

Is this the correct way to store a session variable that increases by 1? After this, I would like to display the value of the variable $_SESSON[$pagenum] in the title of my html pages.

Answer 1

Not sure what you want to achieve, but simply like this?

<?php
if(!isset($_SESSION[$pagenum]))
{
    //New user
    $_SESSION[$pagenum] = 1;   
}

$_SESSION[$pagenum]++; 

?>

<h1><?php echo $_SESSION[$pagenum] ?></h1>

same in the title:

<title><?php echo $title; ?></title>

Answer 2

You're on the right track, but looking at your code I guess that your variable $pagenum does not exist. The $_SESSION is just like an array, so use an unique string to assign something, eg $_SESSION['pageNumber'] . Also in this case you cannot miss the else, or the starting value will be 2. So your code would become:

if(!isset($_SESSION['pageNumber'])) {
  $_SESSION['pageNumber'] = 1;
} else {
  $_SESSION['pageNumber']++;
}

In your HTML you can echo it with:

<h1>Hello world!</h1>
<p>You are visiting page <?php echo $_SESSION['pageNumber']; ?></p>