PHP - how to change meta contents of the page AFTER including header.php?

Question

Page.php

<?ob_start():
include('header.php');
?>

<? $pageTitle='Page';
echo 'body html';
?>

<?
$pg=ob_get_contents();
ob_end_clean();
echo str_replace('<!--TITLE-->',$pageTitle,$pg);
?>

header.php

<!-- Basic -->
<title><!--TITLE--> | DEMO</title>
<!-- Page Description and Author -->
<meta name="description" content="">
<meta name="author" content="">

How do I include the meta description content and author content with other meta name in my page.php after inserting the header.php file at the top of the page?

Answer 1

if you do not like to modify the header file .. you can do the following ... but i advice you to make your code structure better than this :( it need to be more dynamic

<?php

ob_start();
include('header.php');
$pageTitle='Page';
echo 'body html';
$pg=ob_get_contents();


$description = 'your description';
$author = 'your author';



//delete old desc and author
$pg = str_replace('content=""', '', $pg);
//add anew desc and author
$pg = str_replace('name="description"', 'name="description" content="'.$description.'" ', $pg);
$pg = str_replace('name="author"', 'name="author" content="'.$author.'" ', $pg);

ob_end_clean();
echo str_replace('<!--TITLE-->',$pageTitle,$pg);


?>