Dissection of a WordPress theme: Part 3

Page list

Pages are a new feature in WordPress 1.5 and allow you to define ‘static’ content outside the normal blog timeline. This is very useful for more permanent content such as contact pages and author biographies.

Typically you want your pages to appear in the sidebar so that visitors can navigate to them. This is achieved with:

<?php wp_list_pages('title_li=<h2>' . __('Pages') . '' ); ?> 

Notice how this doesn’t look like any of the previous sidebar sections. Full details of the wp_list_pages function can be found in the Codex.

Currently the function is passed the parameter:

'title_li=<h2>' . __('Pages') . '</h2>'

This instructs the function that the title for the page list should be <h2>Pages</h2>. By default the wp_list_pages function returns the pages as an unordered list, matching the rest of the sidebar sections.

Note that another WordPress internationalisation function is used here: __(‘Pages’). This is a function called __(), which does the same as _e(), but instead of echoing the string to the screen it returns it to be used for further processing.

The Codex describes several other arguments that the function accepts, and I will present a few alternatives here.

By default the list will be a multi-level page hierarchy. We can configure the depth as follows:

<?php wp_list_pages('title_li=<h2>'.__('Pages').'&depth=1');?> 

Page depth

Left: multi-level, right: single level

We can also display other information along with the page title. Here we show the last modified time of the page:

<?php wp_list_pages('title_li=<h2>'.__('Pages').'&show_date=modified');?> 

Page modified

A useful feature is the ability to exclude certain pages:

<?php wp_list_pages('title_li=<h2>'.__('Pages').'&exclude=9');?> 

The ID of the excluded page (here shown as 9 for ‘Parent test’) can be found in the WordPress administration page.

Page excluded

Archives

The archive section displays the history of your blog posts. The longer you maintain your blog, the more entries you will have.

<li>
  <h2><?php _e('Archives'); ?></h2>
  <ul><?php wp_get_archives('type=monthly'); ?></ul>
</li>

Like the wp_get_pages function, wp_get_archives also supports several parameters. The example shown above will display the archives on a month-by-month basis, with a maximum of 12 months. A full list of the options can be found in the Codex.

For example, to change the output to show the archives over the last 4 weeks:

<?php wp_get_archives('type=weekly&limit=4’); ?> 

Weekly archives

If you look in header.php you will notice that the wp_get_archives function also gets called here:

<?php wp_get_archives ('type=monthly&format=link'); ?> 

This provides a series of links to the archives which, given an appropriate browser, can be presented to the user as navigational aids.

Categories

As you would expect this section displays the categories. These are configured from the administration section and assigned to posts.

<li>
  <h2><?php _e('Categories'); ?></h2>
  <ul><?php list_cats(0, '', 'name', 'asc', '', 1, 0, 1, 1, 1, 1, 0, '','','','','') ?></ul>
</li>

The list_cats function accepts many arguments, all of which are detailed in the Codex. There is an equivalent function that accepts arguments as a text string, called wp_list_cats. This is much more succinct and the above function call can be rewritten as:

<?php wp_list_cats ('sort_column=name&optioncount=1') ?> 

Just like the other sections, you can modify the appearance of the categories as you see fit.

Meta data

This section includes all the blogroll links, as well as the links to WordPress, XHTML validators, and XFN.

 <?php /* If this is the frontpage */ if ( is_home() || is_page() ) { ?>       

  <?php get_links_list(); ?>
 
  <li><h2><?php _e('Meta'); ?></h2>

  <ul>
    <?php wp_register(); ?>
    <li><?php wp_loginout(); ?></li>
    <li><a href="http://validator.w3.org/check/referer" title="<?php _e('This page validates as XHTML 1.0 Transitional'); ?>"><?php _e('Valid <abbr title="eXtensible HyperText Markup Language">XHTML'); ?></a></li>
    <li><a href="http://gmpg.org/xfn/"><abbr title="XHTML Friends Network">XFN</abbr></a></li>
    <li><a href="http://wordpress.org/" title="<?php _e('Powered by WordPress, state-of-the-art semantic personal publishing platform.'); ?>">WordPress</a></li>
    <?php wp_meta(); ?>
  </ul>
  </li>
<?php } ?>

The entire section is wrapped inside an if statement (line 1 and 16):

if ( is_home() || is_page() )

The information is only displayed when viewing the home page or a WordPress ‘page’ page. If you want the links displayed regardless of context then remove the if statement and surrounding braces.

The blogroll is displayed with a call to:

<?php get_links_list(); ?> 

The only option available with this function is to change the order of links.

Next up is the meta data. This consists of normal links, along with a few special function calls:

  • wp_register – displays the ‘register’ link, or ‘site administration’ if already logged in
  • wp_loginout – displays the ‘login’ or ‘logout’ links
  • wp_meta – enables all meta-related plugins to function

None of the links are mandatory, and you can add your own. I will remove the XFN link as I don’t think it’s necessary.

Additional sidebar functions

As discussed earlier, there are no requirements for what you can and cannot put in the sidebar. Many plugins exist to insert suitable data, and you can find these in the WordPress Plugin Database.

There are also several built-in functions that you may find useful. A full description of all the available functions can be found in the Codex. Here I will present a popular one which displays a calendar, with blog postings highlighted on a day-by-day basis. It’s a nice navigational aid and means a visitor doesn’t have to trawl through archive sections when looking for other recent posts.

I will add the calendar before the meta-data information:

<li>
  <h2><?php _e('Categories'); ?></h2>
  <ul><?php list_cats(0, '', 'name', 'asc', '', 1, 0, 1, 1, 1, 1, 0,  '','','','','') ?></ul>
</li>

<li><h2><?php _e('Calendar') ?></h2><?php get_calendar () ?></li>     

<?php if ( is_home() || is_page() ) { ?>

The result is:

Calendar

We will style this in the next section.

86 thoughts on “Dissection of a WordPress theme: Part 3”

  1. Excellent and very useful article!!!! Thank you for taking the time to share it with everyone.
    Sincerely,
    donald

  2. It probably is easier to keep search in a separate file, especially if you are likely to change your mind about it. You mention changing its location. You might also want to swap out the supplied WordPress search and use another search (e.g., Technorati, Google).

  3. Great article – really makes it all clear and inspires to make up your own layouts!

    PDF copy of all parts for offline brainstorming would be great! 🙂

  4. Superb resources – I’d echo the call for a printable version of the full article. PDF? *shudder* :o)

    Respect – a great effort, and a generous share.

  5. I’m working on putting together a PDF version and it’ll probably appear shortly after I complete the series. WordPress is a lot less print-friendly than I hoped for!

    Thanks for the comments too.

  6. Awesome articles. This + your “installing WP on a local server” post are a dream come true. Any chance you can also add a part some day about making two sidebars? That’s a feat that is soooo far beyond me that I’m stuck with only a few themes to choose from.

  7. Ugh. Help! This is a fantastic tutorial, and it’s providing me with exactly what I’m looking for. However, after concluding part 2, I am very close to achieving just what I wanted (with the layout, not the styles), but something isn’t right with the sidebar and I can’t seem to figure out what it is!

    Does anyone have any suggests?

    Thanks so much in advance.

  8. Hi Matt. What are you trying to do with the sidebar? There’s only one style in your CSS for the sidebar, and I imagine you want to get rid of the bullet points – you’ll need to change the list-style-type. Hope that helps.

  9. Hi John. Thanks so much for responding!

    I could see from your comment that you must have been seeing something I’m not, so I opened up my site in Firefox, instead of IE. In Firefox, the site is a nightmare, and I hadn’t even realized! Looking at in Firefox, everything you see in white (the header, the blog entries) should be centered. The sidebar should also have a white background (I just haven’t done it yet), and it should be right where it is, beside the content. I don’t know WHAT the hell those bullets are all about!

    Looking at the site in IE, you’ll see that everything is centered correctly, the way I actually want it (though it seems to have other problems).

    I followed your examples very closely, but of course had to make alterations because the elements of my design are different. (No header image, for example; instead, a whole series of html with rollover buttons, etc.) Somewhere in that process, something went wrong…

    Thanks again for responding. This is a GREAT site. You’ve done a better job that 99% of the other sites out there!

    Matt

  10. You know what, John? I’m gonna start from scratch. My site is turning into a horrible mess, so I need to go one small detail at a time and fix it.

    But thanks anyway. 🙁

    Matt

  11. Pingback: Standing Tall
  12. John,
    I hang my head low and yet again ask for your assitance. Arrrgghh! (pride growls)

    A while back I commented that a mysterious white box overlaid on only a few pages. (Welcome and Disclaimer) If you resize the window the box disappears. I did as you said and removed the hover links – yet the white box overlay remains on my site when viewing with IE. Firefox is my hero still because it never had trouble whatsoever.

    Ideas?
    j

  13. Hi jd,

    I’ve only managed to find the problem on the ‘Welcome visitors’ link, and I couldnt reproduce it on my local machine – it only seems to occur on the live website. Are there any other places it happens?

  14. Hey John,
    Yes, it still happens on the live site for me on the bottom Disclaimer link and when clicking on the newest category I created http://www.wels.net/wordpress/archives/category/general/living-bold/. Incidentally, that too may be a clue, because the previous “new” category, now works! I feel uncomfortable with my coding in single.php, archive.php and page.php when defining the 3rd column and with how I’m ending the body/html tags for page.php. Look at the code starting at the endif statement prior to the get footer.

    jd

  15. John,

    I have successfully styled the search form, and now that I have added a drop-down menu I’d like it to match. I tried this:

    #sidebar select
    {
    border: 1px solid #a97
    }

    But nothing happens. I tried adding a background color, and that worked, so I don’t know why the border isn’t working. Any ideas? Also, is it possible to color the little box with the arrow in it? I tried googling “styling drop-down menus” but everything out there is about JavaScript and DHTML and CSS-built menus… nothing for styling good old simple HTML forms, at least nothing that includes drop-downs.

  16. Drop down boxes are not very well supported by CSS, and are displayed differently in every browser and operating system. You can’t change the arrow without some major Javascript coding, and changing the border colour works in Firefox, but not IE. Some things are best left alone!

  17. Oh well — thanks anyway. Maybe I should undo the styling of the search form, so that the sidebar forms are consistent.

    (Actually, that border color doesn’t work for me even in Firefox.)

  18. Responding to a few of the earlier posts about the bullet points appearing in the wp_list_pages, anyone know why it shows up in the first place? I fixed it with this code here

    #sidebar li, #pagenav {
    list-style-type: none;
    }

    but had to scratch my head over it for a fair while.

  19. The bullet points appear because wp_list_pages outputs the pages as an HTML unordered list, which will get bullet points unless you specifically turn them off in the CSS. You have the right solution to change this!

  20. I am trying to figure out what the ‘wp_specialchars($s, 1);’ function does, could someone perhaps nudge me in the right direction? Thanks for your explanation of the other things, I definitely learned something.

  21. wp_specialchars just encodes certain HTML entities (such as > and <) into a correct form to display on a page (such as &gt; &lt;)

  22. great read.
    I copy and pasted the “Author” code.
    I get a ?Author? as the title.
    How do I remove the begining and ending question marks ?

  23. Hey John

    Thanks for this great tutorial!

    Im having difficulty getting my photo to appear, as I have copied the code verbatim from part 3 page 3. You say that I need to change the part, but I guess Im not following exactly what I need to write here for my picture to show up? I uploaded my picture into the images folder and entitled it author.jpg.

    Cheers, Ryan

  24. Yeah Im getting this weird link for my picture when I right click

    http://www.ryanismy.name/?wp-content/themes/SpahnTheme/images/author.jpg?

    Im getting these ? marks right after my URL and at the end of the URL

    If you click the link below you’ll see I have the right properties to the photo.
    http://www.ryanismy.name/wp-content/themes/SpahnTheme/images/author.jpg

    I also was having that ‘author’ problem because of copying/pasting, so I changed it accordingly to your advice and I also changed the (‘template path’) command in the same fashion, but still having a problem making my pic appear.

    Thanks again,
    Chaser

  25. When I copy and pasted

    ’ . __(‘Pages’) . ‘’ ); ?>

    and refreshed my browser I am now getting a mysterious “About” heading that I can not find anywhere in sidebar.php. I don’t want it and I can’t figure out how to get rid of it.

    Thanks, Chaser

  26. John…
    I followed your instructions and almost created my blog site. I’m stuck at this one thing. Hope you can find some time to help me. I wanted to use the ‘Pages’ link in my header. I couldn’t figure out how to align the links (in the Pages section) in a row – and not in columns. Am I missing something obvious?

    P.S.: Thanx very much for the “tutorial”. Helped me a lot.

  27. Chaser: The code for the ‘about’ has to there somewhere! Try inserting text at different points in the filee and see if you can narrow it’s location down

    Ravi: Take a look here listamatic – it’s a great resource for displaying lists in every direction possible

  28. Thanks for writing this…I’ve been having trouble with learning WP, but now that I found your site, I think I will be able to figure it out. Thanks!

  29. Hi John

    I have installed the Giraffe theme and I really like it. I’m having a problem trying to edit the sidebar and what I want to do is to get rid of the Blogroll heading and its contents that seem to come with every fresh install of WordPress. I expected to find this in sidebar.php and thought I would be able to remove it from here, but I can find no trace of it here. Can you advise me on how to do this?

    Also, I presume that if I want to add a heading to the sidebar that I do this using sidebar-extra.php

    Hoping you can help.

    Regards

    Duncan

  30. The links are configured from the WordPress administration section, and are not part of the theme. If you delete them all from inside WordPress then they will disappear from your blog.

    Yep, sidebar-extra.php is where you can add any extra element into the sidebar

  31. Hi and thanks for this good tutorial.

    There is only one thing which does not work on my side, the modification of the ‘#sidebar ul h2’ style. Nothing happened.
    I’ve checked all my CSS file, all looks good. Also I’ve tried with ‘#sidebar h2’, ‘#sidebar ul ul h2’, ‘#sidebar li ul h2’…but nothing better 🙁
    I’ve
    Any suggestion ?

    Thanks

  32. You can narrow down the problem by changing the background colour of the elements. For example, first do:

    #sidebar { background-color: red }

    And verify that the sidebar is red. Then turn #sidebar ul red instead etc. Using this method you can track at which point it stops working, which may help you determine if the problem is in your CSS or HTML.

  33. Thanks for your tutorial. I was using the Kuberick theme as the basis for my site, and this really helped me strip it down and modify it.

    I am still having one tiny issue. When you look at an individual post, or a category with few posts, and the post is shorter than the sidebar the background does meet the footer. http://www.mixedstudentresources.com/?p=51
    And the best part is that it is fine in IE, but messed up in Firefox.

    Any ideas?

  34. This tutorial couldn’t have made the process of creating a custom theme any easier. I personally thank you for taking the time to help all of my fellow theming n00bs in getting a custom theme on WordPress.

  35. Ani, you can force this in Firefox by adding a special clearing div element just after the content.

    So,

    <div id="container">
    <div id="content>YOUR CONTENT</div>
    <div style="clear: both"></div>
    </div>

    That basically tells the browse to bring any floating elements (such as the sidebar) back into the main flow of the page, and so displaying the background in FireFox.

  36. Jo, if you increase the size of the sidebar you’ll probably need to decrease the size of the content area. Once you’ve done that the rest of the theme will fall into place

  37. […] Dissection of a WordPress theme: Part 3 | Urban Giraffe (tags: WordPress Reference Blogging Tips Themes) This was written by Carlos. Posted on Wednesday, December 26, 2007, at 2:18 pm. Filed under Links. Bookmark the permalink. Follow comments here with the RSS feed. Post a comment or leave a trackback. […]

  38. Hey!
    Great tutorial! VERY good!
    Now, it’s been a while since you wrote it according to the dates, so I don’t know if you’ll reply this or not.
    When I try to put the calendar up, the whole site freezes and it dissappears leaving only the header..
    And the menu bar is too big, it doesn’t fit properly..

    http://www.mie-design.com

    Do you know what’s wrong?
    🙂

  39. Very good text. I’ve found your site via Bing and I’m really glad about the information you provide in your articles. Btw your sites layout is really messed up on the Kmelon browser. Would be cool if you could fix that. Anyhow keep up the good work!

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