我如何使用PHP在html页面中创建全局后缀标题

Question

I should make global suffix title for my website pages. For example:

<title> Watches - "global suffix" </title>

Answer 1

header.php

<?php
    ....
    $title = 'Title';
    ....

index.php

<?php include('header.php'); ?>
....
<title> Watches - <?php echo $title; ?> </title>