The body_class function is nice for adding a bunch of classes to the body tag that have information about what kind of page is currently being displayed. Probably for styling purposes. But for whatever reason, it doesn’t include a class for the current category (or categories) for a single post.

This adds that category “nice” name:

add_filter('body_class','add_category_to_single');
function add_category_to_single($classes, $class) {
  if (is_single() ) {
    global $post;
    foreach((get_the_category($post->ID)) as $category) {
      // add category slug to the $classes array
      $classes[] = $category->category_nicename;
    }
  }
  // return the $classes array
  return $classes;
}

 

Put this in the theme file somewhere near where you output the_content() (likely in the single.php or page.php file) to make a link you can click that takes you into the admin to edit it. This link will only be visible when the viewer is logged in and has appropriate permissions to edit that page (administrator or author).

When you upload an image through the WordPress media uploader and then insert it into the editor, it comes with width and height attributes. These are normally desirable, as it assists the browser in making the appropriate room for the image during layout. But if you want to remove the insert action from adding these attributes, you can add this code to you functions.php file or a functionality plugin of your own making:

add_filter( 'post_thumbnail_html', 'remove_width_attribute', 10 );
add_filter( 'image_send_to_editor', 'remove_width_attribute', 10 );

function remove_width_attribute( $html ) {
   $html = preg_replace( '/(width|height)="\d*"\s/', "", $html );
   return $html;
}