Answers.Body: <p>You'll want to use the <a href="https://docs.craftcms.com/api/v4/craft-base-element.html#event-define-sidebar-html" rel="nofollow noreferrer"><code>EVENT_DEFINE_SIDEBAR_HTML</code> event</a> like so:</p>
  <pre><code>use craft\elements\Entry;
  use craft\events\DefineHtmlEvent;
  use craft\helpers\UrlHelper;
  use yii\base\Event;
  
  Event::on(
      Entry::class,
      Entry::EVENT_DEFINE_SIDEBAR_HTML,
      function(DefineHtmlEvent $event) {
  
          /** @var Entry $entry */
          $entry = $event-&gt;sender;
  
          // Make sure this is the correct section
          if ($entry-&gt;sectionId == 5)
          {
              // Return the button HTML
              $url = UrlHelper::url('some/path/' . $entry-&gt;id);
              $event-&gt;html .= '&lt;a href=&quot;' . $url . '&quot; class=&quot;btn&quot;&gt;My Button!&lt;/a&gt;';
          }
  
      }
  );
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-15T07:09:37.470Z
Answers.LastActivityDate: 2022-12-15T07:09:37.470Z
Answers.UserDisplayName: Jalen Davenport
Body: <p>I'm trying to add a custom button in the sidebar of one of my entries.</p>
  <p>I've found that it could be done in Craft 3 with this template hook: <code>cp.entries.edit.details</code> (e.g. <a href="https://craftcms.stackexchange.com/questions/14516/how-to-add-a-custom-button-at-the-right-section-of-an-entry/14526#14526">How to add a custom button at the right section of an entry?</a>)</p>
  <p>In the Craft 4 upgrade documentation, it mentions that this hook <a href="https://craftcms.com/docs/4.x/extend/updating-plugins.html#template-hooks" rel="nofollow noreferrer">has been removed</a>. I found these two events -  <code>EVENT_DEFINE_EDITOR_CONTENT</code> and <code>EVENT_DEFINE_ADDITIONAL_BUTTONS</code> - but so far, I haven't been able to return html to my template.</p>
  <p>Is there an easy way to do it in Craft 4?</p>
  
Tags: <control-panel><events><hook>
Title: Adding Custom button to CP
ThreadText: # Adding Custom button to CP
  
  (Asked by: username_0 on 2022-12-14)
  
  I'm trying to add a custom button in the sidebar of one of my entries.
  
  I've found that it could be done in Craft 3 with this template hook: `cp.entries.edit.details` (e.g. [How to add a custom button at the right section of an entry?](https://craftcms.stackexchange.com/questions/14516/how-to-add-a-custom-button-at-the-right-section-of-an-entry/14526#14526))
  
  In the Craft 4 upgrade documentation, it mentions that this hook [has been removed](https://craftcms.com/docs/4.x/extend/updating-plugins.html#template-hooks). I found these two events - `EVENT_DEFINE_EDITOR_CONTENT` and `EVENT_DEFINE_ADDITIONAL_BUTTONS` - but so far, I haven't been able to return html to my template.
  
  Is there an easy way to do it in Craft 4?
  
  **Tags:** control-panel, events, hook
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2022-12-15. Score: 0 | Accepted answer
  
  You'll want to use the [`EVENT_DEFINE_SIDEBAR_HTML` event](https://docs.craftcms.com/api/v4/craft-base-element.html#event-define-sidebar-html) like so:
  
  ```
  use craft\elements\Entry;
  use craft\events\DefineHtmlEvent;
  use craft\helpers\UrlHelper;
  use yii\base\Event;
  
  Event::on(
      Entry::class,
      Entry::EVENT_DEFINE_SIDEBAR_HTML,
      function(DefineHtmlEvent $event) {
  
          /** @var Entry $entry */
          $entry = $event->sender;
  
          // Make sure this is the correct section
          if ($entry->sectionId == 5)
          {
              // Return the button HTML
              $url = UrlHelper::url('some/path/' . $entry->id);
              $event->html .= '<a href="' . $url . '" class="btn">My Button!</a>';
          }
  
      }
  );
  
  ```
  
  
  ---
  
  