Change title and description dynamically

I would like to generate a dynamic title and description from pages that require MySQL queries:

index.php

<html>
<head>
    <?php
    switch($page):
        case 'home':
            $body   = 'home.php';
            $title    = 'Home';  
        break;
    
        case 'contact':
            $body   = 'contact.php';
            $title    = 'Contact';  
        break;
    
        case 'members':
            $body   = 'members.php';
            $title    = 'I should put here the member profile';  
        break;
        
    /*
     * More pages
     */
        
        
    endswitch;

    ?>

    <title><?php echo $title; ?></title>
</head>

<body>
    <?php
        require_once $body;
    ?>
    
</body>

Then for instance I should call the pages, such as:

members.php page

<?php
$sql = "SELECT * FROM members WHERE mem_id = :mem_id";
/*
 * More codes
 */

foreach($res as $f):
    $mem_name       = $f['mem_name'];
endforeach;

$newTitle   = 'Profile of '.$meme_name;

 ?>

So how can I put the $newTitle generated from MySQL query inside the title tag

Thanks in advance

Solution

As we can see from the given code you can do below. If you dont really wanted to rewrite your whole code.

members.php

<?php
$sql = "SELECT * FROM members WHERE mem_id = :mem_id";
/*
 * More codes
 */

foreach($res as $f):
    $mem_name       = $f['mem_name'];
endforeach;

$newTitle   = 'Profile of '.$meme_name;

require_once $body;
 ?>

// put this at the buttom of your body
<script>
document.title="<?php echo $newTitle;?>"
</script>

But it will be still recomended that you should prepare your server side variables at the beginning so you will not face that kind of issue.