Get Child Pages List In Wordpress

10th May 2010 - 2 minutes read time

It is possible to print out a list of pages in Wordpress, but these functions are designed to print from the root pages to a certain level. I often need to print out a list of pages that are children of the current page being looked at so I created the following function.

  1. /**
  2.  * Get a list of child pages.
  3.  *
  4.  * @param integer $id         The ID of the parent page.
  5.  *
  6.  * @return string The list of child pages.
  7.  */
  8. function getChildPagesList($id)
  9. {
  10.     // Get the child pages of the current page.
  11.     $args = array(
  12.                     'child_of' => $id,
  13.                     'echo'     => 0,
  14.                  );
  15.     $pages = get_pages($args);
  16.  
  17.     // Build the page list
  18.     $class = '';
  19.  
  20.     $option = '<ul>';
  21.  
  22.     foreach ($pages as $pagg) {
  23.         if (is_page($pagg->ID)) {
  24.             $class = ' class="on"';
  25.         }
  26.         $option .= '<li' . $class . '>';
  27.         $option .= '<a href="' . get_page_link($pagg->ID) . '" title="' . $pagg->post_title . '">' . $pagg->post_title . '</a>';
  28.         $option .= '</li>';
  29.         $class = '';
  30.     }
  31.  
  32.     $option .= '</ul>';
  33.  
  34.     // Return list
  35.     return $option;
  36. }

 

This function works by calling the get_pages() function in order to retrieve the pages that are children to this page. The echo argument is also used and given a 0 to make the function return the array of pages rather than just print them out. To use this function create some pages that have children and pick a page (in this instance page ID 29) you want to print out like this.

print getChildPagesList(29);

To print out the pages connected to the current post use the following:

echo getChildPagesList($post->ID);

 

PHP

Comments

Permalink

Couldn't you use wp_list_pages with the 'child_of' parameter included?

So the equivalent examples would be:

wp_list_pages('child_of=29');

wp_list_pages('child_of='.$post->ID);

and you can also choose whether or not to print out the returned pages with the argument 'echo=1' or 'echo=0'.

Rik (Sun, 06/13/2010 - 14:13)

Permalink

You are quite right, wp_list_pages() would do the job just as well. I'm sure there was a very good reason that I created this function, although I'm not sure what it was now. :)

Add new comment

The content of this field is kept private and will not be shown publicly.

Related Content

Steganography With Images In PHP

15th January 2021 - 18 minutes read time

Steganography is the practice of placing a secret message inside another message and only by looking at the original message in a different way can the hidden message be seen. This might be as mundane as writing a page of text and hiding a message in the text using the first letter of every sentence. Only by collecting the first letter of each sentence together can the hidden message be seen and read.

Modern steganography is defined as hiding a message (or file) inside a file. For example, you might look at an image and see an image, but if a message has been hidden you would also be able to extract it if you know where to look.

Color Sorting In PHP: Part 6

2nd January 2021 - 17 minutes read time

I finished my last post on sorting colors using PHP looking at incorporating all three dimensions into the display of the colors. This lead to some interesting displays of colors in discs using different shapes or lengths as an indication of the color in question. It was still lacking actually rendering out the third dimension in any meaingful way though.

As I am essentially looking at three dimensional data I thought about displaying the data as a cube in a 3D engine. I could then map the three dimensions of colors (red, green, blue) into the three dimensions of the 3D engine (x, y, z). This means creating a 3D scene with random color data and rendering that scene out. Funnily enough, there aren't a lot of people writing 3D rendering engines in PHP so I looked into writing a very basic version that would just show point data.

Extracting Data From An MP3 With PHP

28th December 2020 - 27 minutes read time

I was looking at a media player on my phone the other day and was watching the waveform of the music shown on screen. This was a simple indication of the progress through the track and appeared to show quiet and loud sections of the track I was listening to. This got me thinking about how to extract this information as the media player I was watching must do this in real time in order to actually play the data, not just render this representation of the music.

After a bit of research into the MP3 file format I found that the file format is complex, but straight forward enough to process, so I decided to try and extract the data using PHP. I have seen a few techniques to extract the data from MP3 using PHP, but these largely involve applications like ffmpeg to convert the audio format into something like a WAV file, which is then processed.

Adding Arguments And Options To Deployer Tasks

15th November 2020 - 15 minutes read time

I have been adding to my custom Deployer scripts for a number of months and I have now been using it to do more than just deploy my sites. Since it acts as a connection to my website server I have been using Deployer to perform other tasks like creating backups and clearing Drupal caches without having to log into the server to do it. What has helped me here is that I have set out my deployment tasks in a very modular fashion, so although my deployment runs a database backup, I there is nothing to stop me running the database backup command on it's own without doing a full deployment.

Creating A Game With PHP Part 3: Snake

10th November 2020 - 12 minutes read time

So far in this series of posts we have looked at detecting key presses from the user and creating a game of tic tac toe using PHP and the command line. The next step is to create a game that has graphics and real time user input. As we are using the command line we don't have much space to work with so the graphics we create aren't going to be very detailed. The simplest action game I could think of is snake. It has a few simple rules, can have very basic graphics and doesn't involve any physics or other mechanics that would effect the game as a whole. In fact the game snake dates back to the 1976 game Blockade, which was created using just text strings.