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How To Create Wordpress Widgets

Creating WordPress Widgets

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How To Create Wordpress Widgets

1,366 words, estimated reading time 7 minutes.

Wordpress Widgets are pieces of add-on code that extend the functionality of Wordpress, either behind-the-scenes or extra visual code. Widgets allow these code segments to be quickly and easily added to predefined sidebars on most themes.
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  4. Installing Wordpress
  5. Setting Up New WordPress Site
  6. How To Install WordPress Themes and Plugins
  7. Using WordPress Custom Fields
  8. Creating WordPress Themes
  9. How To Create Wordpress Widgets
  10. 10 Essential WordPress Plugins for 2008
  11. WordPress Security 101

This article refers to old versions of Wordpress. For an up to date guide for the most recent versions (2.8+) please see this article - How To Create Widgets for WordPress 2.8

Before Wordpress version 2.0, these Wordpress Widgets had to be hand coded into the theme template, so knowledge of PHP was required. In version 2.0 they introduced "Widgets" which wrap around a plugin and allow a non-code editing method for incorporating into a theme using sidebars and a drag and drop interface.

This tutorial covers creating a Widget, creating a plugin widget, adding sidebars to a theme, and upgrading a non-widget plugin.

Creating a Simple Wordpress Plugin

You can use this as a code snippet for your projects. I am going to create a simple plugin that does nothing but display "Hello World". I'll leave the actual functionality of the plugin to you ;)

Create a new php file in your plugin directory called my-hello-world.php, and type the following plugin code:

  1. <?php
  2. /*
  3. Plugin Name: Hello World
  4. Plugin URI:
  5. Description: Sample Hello World Plugin
  6. Author: Tim Trott
  7. Version: 1
  8. Author URI:
  9. */
  11. function sampleHelloWorld()
  12. {
  13. echo "<h2>Hello World</h2>";
  14. }
  15. ?>

The lines inside /* and */ are used by Wordpress to find out about the plugin. We have one function called sampleHelloWorld which does exactly that.

Now, traditionally we would have had to open up the sidebar of the theme you are using, find the location of where you want the Hello World displayed, and hard code the function in. Upload to the server and test. If for some reason there is a problem with your plugin (or a third party plugin) then your site would almost certainly stop working. Changing the location from the left to the right sidebar means editing both files accordingly. This isn't very good.


Widgets take away the need for editing the sidebar files of a theme and allow for a drag and drop interface in the admin panel. Let's have a look at how we can widget enable our plugin.

Open up the Hello World plugin file again and add these lines:

  2. function widget_myHelloWorld() {
  3. ?>
  4. <h2 class="widgettitle">My Widget Title</h2>
  5. <?php sampleHelloWorld(); ?>
  6. <?php
  7. }
  9. function myHelloWorld_init()
  10. {
  11. register_sidebar_widget(__('Hello World'), 'widget_myHelloWorld');
  12. }
  13. add_action("plugins_loaded", "myHelloWorld_init");

The first function here is what will be displayed on the sidebar when it's set-up correctly. Notice that we are calling on our old function. This is upgrading the existing plugin to be widget enabled. You can if you like replace the function call with the function statements and combine the two functions.

The second function is called by Wordpress when the plugin is activated. It calls a Wordpress function that will register a new widget which will be called "Hello World" which will call our new widget function.

Add action just tells Wordpress to call myHelloWorld_init when the plugin is loaded.

Enhancements for Theme Compatibility

While this widget will function fine, we can make some improvements to enable greater theme compatibility - not everyone uses the same themes as you test on.

Wordpress will pass parameters to your widget, which contain information about the sidebar and the CSS classes. We should process these parameters and output the correct tags, or you risk breaking some themes.

The first thing we need to do is change our sampleHelloWorld function so that it will accept parameters, then to process these parameters into variables. This is done using the extract function.

  2. function widget_myHelloWorld($args) {
  3. extract($args);
  4. ?>
  5. <h2 class="widgettitle">My Widget Title</h2>
  6. <?php sampleHelloWorld(); ?>
  7. <?php
  8. }

These two lines will allow us to reference some variables and output correct HTML structure for the theme being used. The most important variables are before_widget, after_widget, before_title and after_title. Previously we have surrounded the widget title with a hard coded H2 tag with a CSS class widgettitle, but many themes do not support these tags. They may use a div, or an h1 or a span, so we need our widget to be flexible.

  2. function widget_myHelloWorld($args) {
  3. extract($args);
  4. echo $before_widget;
  5. echo $before_title;?>My Widget Title<?php echo $after_title;
  6. sampleHelloWorld();
  7. echo $after_widget;
  8. }

These changes will allow our plugin to use the same tags as the theme author informs us we need to use and will allow your widget to look the same as the other widgets in the sidebar.

To configure these options inside a theme, please see the section below on theme support.

Complete Plugin:

  1. <?php
  2. /*
  3. Plugin Name: Hello World
  4. Plugin URI:
  5. Description: Sample Hello World Plugin
  6. Author: Tim Trott
  7. Version: 1
  8. Author URI:
  9. */
  11. function sampleHelloWorld()
  12. {
  13. echo "<h2>Hello World</h2>";
  14. }
  16. function widget_myHelloWorld($args) {
  17. extract($args);
  18. echo $before_widget;
  19. echo $before_title;?>My Widget Title<?php echo $after_title;
  20. sampleHelloWorld();
  21. echo $after_widget;
  22. }
  24. function myHelloWorld_init()
  25. {
  26. register_sidebar_widget(__('Hello World'), 'widget_myHelloWorld');
  27. }
  28. add_action("plugins_loaded", "myHelloWorld_init");
  29. ?>

Testing your Plugin

If you check your plugins page now, you should now have a new plugin listed called Hello World which you can activate. On the Presentation tab, select widgets, and you should see your new widget available to be dragged onto a sidebar. Save your changes and admire your new work.

Wordpress Widget listed as installed
Wordpress Widget listed as installed

Stop! My Theme Doesn't Support Widgets!

If your theme does not have widget enabled sidebars, this little tutorial will help make it widget enabled. I am using a very basic sidebar theme, most sidebars are a little more complex than this.

  2. <div id="sidebar">
  3. <ul>
  4. <?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar() ) : ?>
  5. <?php wp_list_pages('title_li=<h2>Pages</h2>' ); ?><br/>
  6. <li><h2>Archives</h2>
  7. <ul>
  8. <?php wp_get_archives('type=monthly'); ?>
  9. </ul>
  10. </li>
  11. <?php wp_list_categories('show_count=1&title_li=<h2>Categories</h2>'); ?>
  12. <?php endif; ?>
  13. </ul>
  14. </div>

The first of these lines does an if else statement, if we have a sidebar function call it otherwise we do the existing hard coded sidebar.

The second line (endif) tells the if statement where the hard coded sidebar ends. Anything between the first and second lines will be shown if widgets are disabled or no widgets are assigned to the sidebar.

Before you can add a widget to this sidebar, we need to make Wordpress aware of it by registering it.

Open, or create, functions.php in your theme folder, and find (or add) a line like this:

  2. <?php
  3. if ( function_exists('register_sidebars') )
  4. register_sidebars(1);
  5. ?>

Where the parameter to register_sidebars is the number of sidebars defined in your theme. You can have any number of sidebars. Now you will be able to add widgets to your sidebar.

Should you wish to configure the elements that will appear before and after a widget or the tags that a widget title will appear in, you can setup the options array and pass it to the register_sidebar function.

  1. register_sidebar(array(
  2. 'before_widget' => '<li>',
  3. 'after_widget' => '</li>',
  4. 'before_title' => '<div class="sidebar_title">',
  5. 'after_title' => '</div>',
  6. ));

This will cause the widget to be contained within <li></li> tags and the widget title will be in a div with the CSS class sidebar_title.

As with most programming and development, there are a number of different methods of obtaining the same results, the techniques listed here are just what works for me.

You may also be interested in reading how to create control panels for your widgets.

Last updated on: Wednesday 21st June 2017

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  1. Andrew

    Thanks for tutorial! I never attempted to write a plugin before for a fear it would be too complicated.. Now I shall try! :)

  2. otenyano

    The plugin works. But I can only use the widget one time. How to make it usable on more sidebars?

    1. Tim Trott
      Tim Trott

      This article refers to old versions of WordPress. For an up to date guide for the most recent versions (2.8+) please see this article –

  3. Alok Ranjan Dubey
    Alok Ranjan Dubey

    Thanks,I get a good knowledge about your right instruction.

  4. mahmud

    thanx for informative post. i am a newbie to php and do not follow the array, argument etc functions. Please write a tutorial on how to create a simple widget which i can place anywhere in my theme using div tag. Thanks in advance.

  5. alan

    Excellent! Thanks for this .. exactly what I was looking for!!

  6. Amitabha Roy
    Amitabha Roy

    The tutorial is small and best. I have learnt widget creation very quickly from here. Thanks.

  7. satish

    Awesome article.. thanks a lot.

  8. Raul Singh
    Raul Singh

    Thanks Buddy,
    A very well written article. Cheers..keep the good work...

  9. Todd M.
    Todd M.

    Love this. Thank you for the info.

  10. ibnu

    thanks, nice info...

    i just learn create plugin that contain widget....

  11. Udar Gromov
    Udar Gromov

    2012-01-31 TUE 13:40
    First time ever I am leaving a comment!
    Because, this is a pure gold!
    I was able to create my Plug-in in minutes.
    This not only usable, by educational!
    Especially valuable for me was Summary.

    Fantastic! Thank you for your style of presenting!
    As a courtesy to readers, I ran a spell check on my message.

  12. Tim Love
    Tim Love

    This is an excellent article. As someone who has no programming skills, but loads of ideas for wordpress plugins; which is the best place for me to go to be able to hire someone with suitable skills to be able to do the programming for me?

  13. Shaile

    Hi ,

    Thanks to help us.
    It's great and very easy way to make a wedget thanks a lot....:)

  14. Wingman

    Thank you very much for the post! Simple and clear! Just great!

  15. relisys

    Tim Trott you are absolutely awesome! I have been trying to get this solution for 4 days straight and no one on irc or anywhere else could help me.

    Many thanks !!!!! Thank you Thank you Thank you.!!

  16. SAMsan

    Awesomeness !

  17. Steven Ferrino
    Steven Ferrino

    Thanks Tim, this just saved me a bunch of time.

  18. DavidM

    Thank you much. I'm working on a plugin right now using this base and hopefully will get it released very soon.

  19. Cairns Diver
    Cairns Diver

    Thanks for the tutorial, I was trying to find a way to convert mt plugin into a widget for the sidebar.

  20. Chad Huntley
    Chad Huntley

    Thanks for this tutorial, it was very helpful in developing a new widget for BuddyPress!

  21. IWM - Marketing Internet
    IWM - Marketing Internet

    Tim, with your help I created my first widget ever!

    Thanks a lot man

  22. Deep C
    Deep C

    Simple and Superb !!

  23. DesignMango

    Nice tutorial thanks

  24. Orion

    I've followed the tutorial here, & while the widget appears in the plugins list (which I've activated), my activated plugin doesn't show in the Appearance->Widgets list.

    Might you know why?

    - O8

  25. Towfiq I.
    Towfiq I.

    simple and awesome. Thank you so much for this post :D

  26. Prasath

    Thank You very much!!!

  27. Leyton Jay
    Leyton Jay

    This is shockingly awesome.
    Can't believe it was so easy, I would've started doing this years ago if I'd known!

    Cheers mate.

  28. purwa

    wow great! ,this was exactly the solution I was looking for. Thanks alot!

  29. Jeff

    Thank you very much for taking the time to create and share this. With the release of WP 3.0 I'm stepping more into the programing side of WP as I create a custom post type. This is a perfect tutorial for getting me started with Widgets as I wanted a way to display custom post type output in a widget. Thanks!

  30. Dhinakran

    Nice and smart for the plugin creators

  31. Y.Y.W.

    Great tutorial! Thanks for taking the time and post this article. I have bookmarked this post so I can always come back for reference.


  32. MySelf_v1

    Is it possible to use JavaScript for the Widget?

  33. cathy2005

    Is it possible to add a widget programmatically so that the user does not have to Drag/Drop?

  34. Clover

    GEATE ! ! ! !

    Getting this helpful suggestion, I could alive my PHP code as widgets.

    Thank you!!!!

  35. droid free apps
    droid free apps

    sweet, I have to create my own widget some a site am working on..

  36. mona

    thank.It help me to make my plugin..

  37. Dan

    Really impressive - very simple but very helpfull. Thanks!

  38. djole

    Very useful article. I am ready to create my personal plugin.
    Thank you.

  39. Glenn


    Nice tutorial. After doing this over and over again I created to tool to take the tedium out of creating WordPress Widgets. Take a look over at and let me know what you think.


  40. Conrad

    Really appreciate this tutorial. Nicely done - simple, quick and to the point. Nicely done.

  41. Angelika

    This was EXACTLY what I needed. Thank you.

  42. Neeraj Kumar
    Neeraj Kumar

    This is a very good example. Since I come from a C++ background, it helped e a lot.

    Thanks again!

  43. Pinyo

    Really excellent tutorial. I appreciate it! Definitely cut my development time in half.

  44. Christher Lenander
    Christher Lenander

    Thank you. This is what I been looking for. lots of articles about creating plugins but few about creating widgets.

  45. Kaitora

    Your plugin has been a great help for me to learn how to create some wordpress plugins. All of the other tutorials I have seen have not included anything on widgets. Thanks for the wonderful resource

  46. jim smith
    jim smith

    Thanks for the hello world style example.
    it was the best example i have found yet.

  47. KreCi

    Thanks man! That is so helpful! You will see my new widget plugin released soon!
    Happy New year 2010! :)

  48. BrandonSch

    Great post , You've really hit the
    nail on the head, I just don't understand why people quite get it.
    I'm not for sure how many people I've talked to concerning this very
    thing in the past month, and they just can't get it.

    , Excellent post!

  49. Mauricio Wolff
    Mauricio Wolff

    Man... a lifesaver.

    Thanks a lot. This tutorial and the plugin "TS Custom Widgets" (that allows me to select wich widget should show on each page/post) makes wordpress even better.

    Tks a lot

  50. Pravin

    @Uppfinnarn, @Stubbornella: The tags aren't mixed up. They are intented that way.

    Instead of using echo $before_title . 'My Widget Title' . $after_title;

    the author should have used
    echo $before_title;?>My Widget Title<?php echo $after_title;

    1. MasterCJ

      Derp, they do the same thing genius. Take a look at the generally used wordpress code conventions sometime and you'll see that the way he did it was far from uncommon.

    2. Pravin

      Oops, the two code lines should be switched.

  51. Markus Freise
    Markus Freise

    Great tutorial to learn first steps. Thank you.

  52. Uppfinnarn

    There are <strong> tags in some of the latter examples; looks weird...

  53. Gopinath

    Thank for your widget creation step by step explaination,its really awesome,,.

  54. manitra


    Thanks for this tutorial, it's an excellent starting point.


  55. chocobee

    thanks for the tutorial. do u know any link that teach how to create advance widget?

  56. Stubbornella

    There are a couple of places where the tag got mixed in with your php.

  57. jigar

    really verry nice article for beginners and its working fine.... thanks ...

  58. Vinicius

    Greate tuto....


  59. Christian

    Great article/tutorial

    How about writing about how to make options/settings for a widget. Thar would really be helpful...

  60. kelik


  61. Aod

    I'm trying to create a sidebar widget using the code at (Simple Text Message), but can't work out which code to change in your example, and where to put the code in from the link? How would the php file handle that if statement?

    1. Glenn


      You might want to try my tool over at It wraps code into a WordPress widget.

  62. Njualem

    Excellent and Cristal-Clear, I can now get into making widgets for my website.

    Thanks a Million.

  63. Dimitar Stoyanov
    Dimitar Stoyanov

    Great article! Really good introduction to widget basics.

    software_developer: thank for the nice link. Really helpful information about widget's setup!

  64. seo free
    seo free

    Thanks really helpful to create a plugin for wordpress..thanks lot..:)

  65. James

    I just created a Google Translate widget for my blog and it only took a few minutes thanks to your introduction. Thanks!

  66. Aakash

    Thanks very much. This is the thing i want !

  67. Jonathan Drain
    Jonathan Drain

    Great article! I found it very straightforward and helpful.

  68. Ian Kree
    Ian Kree

    Nice article. It tells exactly what I need to do.

  69. Abi

    What a simple solution to my problem. I do not know php but is right away going to try this simple methid to make extra widgets for my blog.

  70. gercek

    better than wordpress documentation. thanks.

  71. Davis

    I dont get any of the mubble jummble! please help me in a simple way!!!

  72. Phoenix

    Hello sir, i have a question. How can i create a title field for the widget so the user can rename it with whatever they like. I really blind about php and Wordpress coding. So could you tell me the code and where to place it. Don't worry i can figure it out. Thanks:).

  73. Björn

    Thanx a lot for this nice tutorial ... !!!

    Merry Christmas from Germany...

  74. Jeff R.
    Jeff R.

    I am a little confused by this line;

    &lt?php echo $after_title;

    Is that supposed to be an actual less than bracket, making an opening php tag?

    And, I thought when I started reading this that the Hello World example was just to show you the initial step. What is the purpose of it being called later in the function? I thought for an instant maybe we were supposed to put HTML in there, but you have the widget tags to use what the user theme has already...


    1. Tim Trott
      Tim Trott

      You are correct about the php tag, it got converted to html chars along the way :(

      Not sure quite what you mean about calling the function? I guess your referring to the call to sampleHelloWorld() from within widget_myHelloWorld($args)? This is just to keep the different sections code separate. You can replace sampleHelloWorld() with whatever you wish.


  75. My Puppy654
    My Puppy654

    uhhh..... i don't get it! It looks to complicated! I thought it would be easy but i guess not..... i was planning on making a widget but now i guess not.... :(

  76. Rana

    Very nice article. Thanks

  77. stratosg

    excellent man! very very very helpful thanks!

  78. nkuttler

    Great article, thanks! I've already written plugins but never before a widget. This and your post about how to create control panels for widgets are very useful.

  79. Awshaal

    Thank you so much, such wonderful article.. A++++

  80. Really Nice guide to aadd widgets

  81. chat

    thanks for all..

  82. Fareeha

    Thanks a bunch for the help.

  83. palPalani

    thanks for you information, this is what i&squot;m looking for... great!

  84. McLarty

    Thanks for the great &quot;hello-world&quot; ...I&squot;m just getting started on a plugin!

    got any good links to the next steps? Eg. Calling a flash movie or creating options inside of WordPress for the plug-in?

  85. don

    Thx!! A nice and easy to follow explanation!

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