Is there a PHP variable that will fetch the TITLE of the file?

Question

I learned (thanks to David Powers) that you can use $_SERVER['PHP_SELF'] to refer to your current URL, which is useful in situations like putting a "Share on Facebook" button on your page.
However, some of these social networking sites allow you to also put the Article Title in the same button, so I was wondering if there was a PHP variable I can use for *that*. This way, by specifying the title of the article in the aptly-named title tag of the page, I can put those "submit this page to" links as includes that don't need to be specifically-edited for each page.

Answer 1

Create a variable for the title and use it in both places.
<?php
$title = 'Things you always wanted to know about...';
?>
<title><?php echo $title; ?></title>
// later on
<?php echo $title; ?>
Alternatively, if your page content is generated dynamically, you can store the title in the database.
Another technique would be to base the title on the page name.
$page = basename($_SERVER['SCRIPT_FILENAME'], '.php');
$title = ucwords(str_replace('_', ' ', $page));
That would store "About Us" in $title if the page is called about_us.php.