Automatic optimize/minify CSS and JS files

//Loading the index file in my template directory
<script type="text/javascript" src="[(base_url)]/assets/templates/mytemplates/libs/"></script>

<?php
ob_start ("ob_gzhandler");
header("Content-type: text/javascript; charset: UTF-8");
header("Cache-Control: must-revalidate");
$offset = 60 * 60 ; // Duration in seconds before the cache expires
$ExpStr = "Expires: " .
gmdate("D, d M Y H:i:s",
time() + $offset) . " GMT";
header($ExpStr);

// Javascript files to compress
include $_SERVER['DOCUMENT_ROOT'].'/assets/libs/extjs/adapter/ext/ext-base.js';
include $_SERVER['DOCUMENT_ROOT'].'/assets/libs/extjs/ext-all.js';

<?php
$minify = ( isset($minify) && $minify == 'true' ) ? true : false;

$ar_chunks = split(',',$chunks);
$ar_chunks = array_unique($ar_chunks);

$output = '';

foreach ($ar_chunks as $chunk) {
	if ($chunk != '') {
		$c = $modx->getChunk($chunk);
		if ($c) $output .= $c . "\r\n";  //linebreak added by JUSI
	}
}

if ($output != '' && isset($wrapperdiv)) {
	$output = '<div id="'.$wrapperdiv.'">'.$output.'</div>';
}
if ($minify == true) {
	require 'assets/snippets/bv-jsmin/jsmin-1.1.1.php';
	$output =  JSMin::minify($output);
}

return $output;
?>

<?php
$q_chunks = $modx->db->query('
	SELECT
		chunk.*
	FROM '.$modx->getFullTableName('site_htmlsnippets').' AS chunk
		INNER JOIN '.$modx->getFullTableName('categories').' AS category
		ON chunk.category = category.id
	WHERE
		category.category IN ("'.$category.'")
	ORDER BY
		name
');	

$ar_chunks = array();
while ($row = $modx->db->getRow($q_chunks)) {
	$ar_chunks[] = $row['name'];
}

$l_chunks = implode(",",$ar_chunks);  //splitter character changed from "||" to "," by JUSI
return $l_chunks;
?>

[[chunkListParser?chunks=`[[getChunks? &category=`bv js` ]]` &minify=`true` ]]