remove header tags - include file

Hi guys, me again. (thanks kevin, but i'm afraid you didn't understand me). After looking for untiringly in the archives I have I decide to ask again. This is my problem: I want include the file html.html inside of my file index.php, but before include it I want to remove <html>..</head> tags from my html.html file. My pseudo code would be look like this:

index.php

<?php include_once("common.php"); header("Welcome to my page");

        include_html_file("html.html");

footer() ?>

common.php function include_html_file($f)

{

        (your kind contribution:-) )

} thanks!! --jp