为WordPress某个文章添加额外的样式

/* 为特定文章添加特定css最简单的方式. */ /*添加自定义CSS的meta box*/ add_action('admin_menu', 'cwp_add_my_custom_css_meta_box'); /*保存自定义CSS的内容*/ add_action('save_post', 'cwp_save_my_custom_css'); /*将自定义CSS添加到特定文章(适用于Wordpress中文章、页面、自定义文章类型等)的头部*/ add_action('wp_head','cwp_insert_my_custom_css'); function cwp_add_my_custom_css_meta_box() { add_meta_box('my_custom_css', '自定义CSS', 'cwp_output_my_custom_css_input_fields', 'post', 'normal', 'high'); add_meta_box('my_custom_css', '自定义CSS', 'cwp_output_my_custom_css_input_fields', 'page', 'normal', 'high'); } function cwp_output_my_custom_css_input_fields() { global $post; echo '<input type="hidden" name="my_custom_css_noncename" id="my_custom_css_noncename" value="'.wp_create_nonce('custom-css').'" />'; echo '<textarea name="my_custom_css" id="my_custom_css" rows="5" cols="30" style="width:100%;">'.get_post_meta($post->ID,'_my_custom_css',true).'</textarea>'; } function cwp_save_my_custom_css($post_id) { if (!wp_verify_nonce($_POST['my_custom_css_noncename'], 'custom-css')) return $post_id; if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return $post_id; $my_custom_css = $_POST['my_custom_css']; update_post_meta($post_id, '_my_custom_css', $my_custom_css); } function cwp_insert_my_custom_css() { if (is_page() || is_single()) { if (have_posts()) : while (have_posts()) : the_post(); echo '<style type="text/css">'.get_post_meta(get_the_ID(), '_my_custom_css', true).'</style>'; endwhile; endif; rewind_posts(); } }