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Creating a PHP header/footer

source: http://stackoverflow.com/questions/8054638/creating-a-php-header-footer
Besides just using include() or include_once() to include the header and footer, one thing I have found useful is being able to have a custom page title or custom head tags to be included for each page, yet still have the header in a partial include. I usually accomplish this as follows:
In the site pages:
<?php

$PageTitle="New Page Title";

function customPageHeader(){?>
  <!--Arbitrary HTML Tags-->
<?php }

include_once('header.php');

//body contents go here

include_once('footer.php');
?>
And, in the header.php file:
<!doctype html>
<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title><?= isset($PageTitle) ? $PageTitle : "Default Title"?></title>
    <!-- Additional tags here -->
    <?php if (function_exists('customPageHeader')){
      customPageHeader();
    }?>
  </head>
  <body>
Maybe a bit beyond the scope of your original question, but it is useful to allow a bit more flexibility with the include.

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