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WordPress 3: Building Child Themes

Restricting content to the first page of the blog


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WordPress 3: Building Child Themes

with Morten Rand-Hendriksen
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  1. 6m 59s
    1. Welcome
      1m 6s
    2. Using the exercise files
      1m 34s
    3. What you need to know before watching this course
      1m 29s
    4. Getting the right tools for theme creation
      2m 50s
  2. 17m 2s
    1. What is a WordPress child theme and when should you use it?
      2m 38s
    2. Picking a parent theme
      3m 55s
    3. Making sure you have the Twenty Twelve parent theme
      1m 50s
    4. Creating and activating a basic child theme
      4m 20s
    5. Importing parent theme styles
      4m 19s
  3. 16m 2s
    1. Using the developer tools
      3m 53s
    2. Modifying existing styles
      4m 24s
    3. Adding space between paragraphs
      4m 7s
    4. Changing font family styles
      3m 38s
  4. 31m 47s
    1. Understanding the WordPress template hierarchy
      3m 12s
    2. Modifying existing templates
      2m 33s
    3. Moving the header image
      4m 29s
    4. Adding Related Posts feature to posts
      6m 26s
    5. Creating custom page templates
      5m 43s
    6. Using conditional statements for customized effects
      5m 41s
    7. Creating custom header, footer, and sidebar templates
      3m 43s
  5. 17m 5s
    1. Understanding the different index pages and what they do
      4m 6s
    2. Adding author, date, and time information to the index loop
      7m 15s
    3. Changing the appearance of category index pages
      5m 44s
  6. 43m 5s
    1. Introducing functions.php
      3m 24s
    2. Overriding existing functions
      3m 23s
    3. Adding pagination to index pages
      5m 49s
    4. Adding to existing functions
      3m 21s
    5. Adding a new footer menu to Twenty Twelve
      6m 24s
    6. Adding a new widgetized area to pages
      4m 9s
    7. Adding static content to the sidebar
      7m 44s
    8. Replacing existing functions
      2m 36s
    9. Adding a Google font through a function
      6m 15s
  7. 10m 24s
    1. Adding new featured image sizes
      5m 41s
    2. Adding featured images to posts and pages
      4m 43s
  8. 31m 1s
    1. Adding a welcome message to the front page
      1m 22s
    2. Displaying page content in an index page
      7m 42s
    3. Hooking in a featured image
      4m 34s
    4. Making the welcome message responsive
      6m 27s
    5. Restricting content to the first page of the blog
      4m 22s
    6. Adding a jQuery function to show or hide the welcome message
      6m 34s
  9. 10m 23s
    1. Adding a custom favicon
      3m 58s
    2. Adding a custom screenshot
      2m 29s
    3. Adding footer information
      3m 56s
  10. 7m 14s
    1. What to do when a child theme crashes your website
      4m 38s
    2. Updating parent and child themes
      2m 36s

Video: Restricting content to the first page of the blog

In many cases, you want to restrict certain content or behaviors to a particular page or post in your site. This is relatively easy when it comes to pages or posts, because you're dealing with single items. But what do you do from the page in question is an index page. We can't test for a specific post id, because the post keeps changing. Instead, we have test to see if the currently displayed template is the one we want and that it is in the order we want it to be in. Let me explain what I am talking about here.

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WordPress 3: Building Child Themes
3h 11m Intermediate Jun 23, 2011 Updated Nov 27, 2012

Viewers: in countries Watching now:

Create a child theme based on an existing parent theme in WordPress and change the functionality, presentation, or styling of your website. In this course, author Morten Rand-Hendriksen shows how to use the default WordPress theme, Twenty Twelve, as a basis for a new child theme and add custom menus; new headers, sidebars, and footers; and index pages with widgets and pagination to your site. The course also demonstrates how to add a responsive welcome message to your front page using PHP and jQuery, and how to edit the many templates found in a WordPress theme. Morten explains how to perform these changes using any code editor, the developer tools in the Chrome browser, and WordPress.

Topics include:
  • Picking a parent theme
  • Creating and activating a basic WordPress child theme
  • Using the developer tools
  • Changing the header image size
  • Using conditional statements for customized effects
  • Adding custom menus to the child theme and/or a template
  • Changing the default footer content
  • Adding featured images to posts
  • Changing the display of meta content (such as date, author, category, etc.)
  • Excluding categories from the front page with custom queries
  • Including functions from external files
  • Identifying and fixing common mistakes
Subjects:
Web CMS
Software:
WordPress
Author:
Morten Rand-Hendriksen

Restricting content to the first page of the blog

In many cases, you want to restrict certain content or behaviors to a particular page or post in your site. This is relatively easy when it comes to pages or posts, because you're dealing with single items. But what do you do from the page in question is an index page. We can't test for a specific post id, because the post keeps changing. Instead, we have test to see if the currently displayed template is the one we want and that it is in the order we want it to be in. Let me explain what I am talking about here.

We added a welcome message to our index template. It displays at the very top of the index template and then underneath you have the index content. However, if I scroll down, and I jump to Page 2 of the index, the welcome message still appears. Logically, we only want the welcome message to appear on the front page, so Page number 1 of the index template. So how do we do that? Well, we have to ask WordPress several questions. We both have to ask it, is this the front page that you are already currently displaying.

And we also have to ask it, is this first of the index pages, so that if it's the 2nd or 3rd or 50th of the index pages, it doesn't display this welcome message. To do this, we are going to use two conditional tags. The first one--and most important one--is one that you might end up using a lot. It's one that's called is_front_page. It basically asks if the page you're currently looking at is the front page, whether or not that page be an index page or if it's a static page.

This depends on how you set what page is displayed as a front page under Settings > Reading, and a FrontPage displays. We are going to use is_front_page in conjunction with another conditional statement called is_paged and I'll explain what that one does in a second. To restrict the welcome message to only the front page, what I am going to do is go to index.php, where this template part is being called, and then I'll wrap the call for this template parts in a conditional statement.

So I'll say if is_front_page, because I want to see that it is the front_page and then I'll also want to test to see if this is the second or third or fourth page. So what I am going to do is use a function called is_paged. is_paged basically tests to see if this is the second, or third, or fourth, or fifth page of an index. But in this case, I want to see that this is not a paged item, meaning it's not paged 2, or 3, or 4, so I am going to put an exclamation point in front of it say, and it is_not_paged.

So if both these conditions are met, I want get_template_part (welcome) to run then I am going to end my conditional statements, save index.php, and then reload this page. Notice that this is currently Page 2 of the index. And now you see the welcome message disappeared from the top, but if I jump back to the front page, the welcome message appears. Just to make sure, I am going to scroll to the bottom and jump to a different page, so I'll jump to Page number 3, and just as it was, Page number 2 we don't see the welcome message.

Here you can see how using conditional statements wisely can give you very interesting results and very detailed control. I'll show you another example of a site I used the same type functionality on to make something happen. On blendinsider.com, I created a function that displays the first story on the front page with larger fonts and more information than the second and third and so on. I'm using the exact same conditional statement is_front_page and is_paged to make sure that it only displays on the first page in the index.

I'm also using an additional conditional statement to test that this only appears on the first post on the index page. So this should give you an idea of how far you can take it when you use these conditional statements. So just remember, anytime you want to display something in just one place, ask yourself if you can ask the database a question and then make that computer and the database figure out what to display using conditional statements.

Find answers to the most frequently asked questions about WordPress 3: Building Child Themes.


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Q: The 2010 version of this course no longer covers installing BitNami. Can you provide directions?
A: Instructions on how to install WordPress using BitNami can be found at
 http://bitnami.org/stack/wordpress. Use the "Installer" option. 
It is pretty straight forward and almost impossible to mess up.

lynda.com also has a dedicated course on WAMP and MAMP (Installing Apache, MySQL, and PHP) that is relevant and you might find helpful.
Q:When looking to download PHP development tool at www.eclipse.org/pdt/, as advised by Morten, but when accessing the site via this link, the screenshot in the movie is very different from what it takes you to on the website.
A: Eclipse has a very active developer cycle and updates quite frequently. The interface changes all the time. I recommend using Notepad++ (Windows) or TextWrangler (Mac) instead. They perform the same function but are far less cumbersome to deal with.
Q: This course was updated on 11/27/2012. What changed?
A: This course was heavily revised to reflect changes to the default WordPress parent theme, Twenty Twelve, and updates to WordPress's functionality. The entire course was re-recorded to reflect changes to the interface. Then we added new movies on text styling, the Related Posts feature, and the welcome message features. There are also two brand new chapters, "Modifying and Adding Functions" and "Working with Featured Images." We recommend that members who have seen the whole course start again from the beginning to get the most benefit from this update.
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