<?php

$page_name = basename ( $_SERVER['PHP_SELF'] );

switch ($page_name) {
    case "photos.php":
        $title = "Photos Title";
        break;
    case "news.php":
        $title = "News Title";
        break;
    case "contact.php":
        $title = "Contact Title";
        break;
}
?>

<title><?= $title ?></title>