An alternative when inserting the image into the editor is the filter image_send_to_editor, which makes adjustments in many ways, but the p-Tag is not involved, since this is set when serving - wpautop().

I'm not particularly gifted in regex expressions and would be happy if you are providing some improvements and ideas to the solution, since this type is used frequently and the use of HTML5 is progressing. Maybe this solution from James is an great part. To what extent WordPress is respondeding is currently not clear at this point and I also couldn't see a filter, so a regex wouldn't be necessary at this place. In this context, there are some issues that require a revision of the WordPress Editor to use the editor in a clean way with HTML5. The Basic Theme I have in HTML5 Version version already incorporated some things.

// unautop for images
function fb_unautop_4_img( $content ) {

    $content = preg_replace(
        '/<p>\\s*?(<a rel=\"attachment.*?><img.*?><\\/a>|<img.*?>)?\\s*<\\/p>/s',
        '<figure>$1</figure>',
        $content
    );

    return $content;
}
add_filter( 'the_content', 'fb_unautop_4_img', 99 );

The theme is also backward compatible, tested up to version 1.5 of WordPress.

Download the theme here

• Projektsite
• SVN Repository mit Diskussionsplattform

FYI, the theme is not a Framework, it is a simple theme, which contains the foundation of a theme only and also a variety of little features from my experience with WordPress. It really means that you have a theme for your clients or yourself created, adapted to the requirements. It doesn't contain any unnecessary markup, as you have with most Frameworks. It will remain as it is now, no Child-Themes or something similar, no hooks for comfortable implementing of code. I like this kind of work, lean and fast, direct to the point. That's why I'm not a big fan of Frameworks in WordPress, but that does not mean that other developers should do the same!

If you like this kind of work and you always write your own theme, then Basis Theme might be something for you. By the management in the SVN you are also have the opportunity to report errors and issues. It would be great if you could help to make this theme even better.

The future

I began to build the Basic Theme in HTML5, so that WordPress can work with it. I also added an example stylesheet, so there is a design available.

In addition, there is a small stylesheet, which displays the new fields and their tags, a good start in HTML5 to have it more visual. The stylesheet is not included in the code but can be added via the web developer toolbar. You can find the stylesheet in the structure under layout/html5areas/html5areas.css. A post with this stylesheet looks like that:

Several parts are currently only in Opera > 9.5 visible. These include all the contents of the comment form.

Work with ...

As a reference I use the summary of w3c and the blog about HTML5. Unfortunately, validating is not so easy, because I don't know any validator which can validate locally. If you know one, please let me know. For IE, I added a script, which teaches IE to deal with various elements.

• HTML 5
• html5doctor
• HTML5 Validator
• HTML5 enabling script

Why all this?

It would be great if one or another can look at it, maybe people who have a profound knowledge of HTML5. Feedback would be great and perhaps one or other might expand the theme with specific tags or elements.

How do I get it?

There is no download link and as of now there are only a few guidelines but it should become the same as WP Base Theme. To become acquainted with the theme or just look over it, you can check it out in the repository. There you are able to comment and discuss.

The folder with all contents can be found in trunk/basis-html5 of the SVN.