// Custom Stylesheet box in Pages/Posts
add_action('admin_menu', 'digwp_custom_css_hooks');
add_action('save_post', 'digwp_save_custom_css');
add_action('wp_head','digwp_insert_custom_css');
function digwp_custom_css_hooks() {
add_meta_box('custom_css', 'Name of custom CSS file', 'digwp_custom_css_input', 'post', 'normal', 'high');
add_meta_box('custom_css', 'Name of custom CSS file', 'digwp_custom_css_input', 'page', 'normal', 'high');
}
function digwp_custom_css_input() {
global $post;
echo '<input type="hidden" name="custom_css_noncename" id="custom_css_noncename" value="'.wp_create_nonce('custom-css').'" />';
echo '<input type="text" name="custom_css" id="custom_css" style="width:100%;" value="'.get_post_meta($post->ID,'_custom_css',true).'" />';
}
function digwp_save_custom_css($post_id) {
if (!wp_verify_nonce($_POST['custom_css_noncename'], 'custom-css')) return $post_id;
if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return $post_id;
$custom_css = $_POST['custom_css'];
update_post_meta($post_id, '_custom_css', $custom_css);
}
function digwp_insert_custom_css() {
if (is_page() || is_single()) {
if (have_posts()) : while (have_posts()) : the_post();
$filename = get_post_meta(get_the_ID(), '_custom_css', true);
if ($filename) {
echo "<link rel='stylesheet' type='text/css' href='" . get_bloginfo('template_url') . "/css/" . $filename . "' />";
}
endwhile; endif;
rewind_posts();
}
}