Minify HTML/JS/CSS Output with PHP

minified.php

<?

/*
Description: Place this code at the top of your PHP page to minify all of it's HTML output
Dependencies: https://code.google.com/p/minify/
*/

function sanitize_output($buffer) {
    require_once('min/lib/Minify/HTML.php');
    require_once('min/lib/Minify/CSS.php');
    require_once('min/lib/JSMin.php');
    $buffer = Minify_HTML::minify($buffer, array(
        'cssMinifier' => array('Minify_CSS', 'minify'),
        'jsMinifier' => array('JSMin', 'minify')
    ));
    return $buffer;
}
ob_start('sanitize_output');

?>

The above code will break on a HTML document on the <style> declaration in the header. Any way to get around it?