I am building my own template system. I am asking myself what is the best/fastest way to Output templated html. Example: body.php
Method1: Building a echostring
$layout = '
<body>
<div id="header">
'.$header.'
</div>
</body>';
Method2: Html with encapsulated php
areas
<body>
<div id="header">
<?php echo $header; ?>
</div>
</body>
What is your recommendation and why?