If you want to include HTML and/or CSS in your blog post, try adding this to your theme’s functions.php:
[php]function include_func($atts) {
extract(shortcode_atts(array(
‘html’ => ”,
‘css’ => ”,
), $atts));
if ($css!=”) {
global $stylenum;
if (!isset($stylenum)) $stylenum=0;
$thisstylename=’externalStyle’.$stylenum;
wp_register_style($thisstylename,’/’.$css);
wp_enqueue_style($thisstylename);
$stylenum++;
}
if ($html!=”) {
ob_start();
$filename=getcwd()."/".$html;
include($filename);
$output=ob_get_contents();
ob_end_clean();
return $output;
}
}
add_shortcode(‘include’,’include_func’);[/php]

Usage in a wordpress post:

Continue reading WordPress Tip: Custom shortcode for including CSS & HTML →