Will search engines be able to find meta tag information echoed from a PHP script?

I'm thinking of doing something along the lines of:

<?php
  $title = "Title of current page";
  include("head.php");
?>

<h1>The stuff that goes inside the BODY tag</h1>

<?php
  include("foot.php");
?>

The Keywords and Description Meta tags will be echoed from within the head.php script. If I do that will search engine开发者_JS百科s be able to read the Keywords and Description? And if it does, how badly would it effect search engine rank?

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Search engines have no knowledge about your server-side includes. If you open your page in a browser, and select "View Source", you will see exactly what search engines see. That is what you want to consider, not your PHP source code.

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isn't that all just server side scripting? What does the final presented file look like? Won't that be the only thing search engines are capable of considering?