Title: preg_replace on image caption
Last modified: August 19, 2016

---

# preg_replace on image caption

 *  [Scott Bressler](https://wordpress.org/support/users/sbressler/)
 * (@sbressler)
 * [16 years, 3 months ago](https://wordpress.org/support/topic/preg_replace-on-image-caption/)
 * I have the following code:
 *     ```
       function send_media_credit_to_editor($html, $attachment_id, $attachment) {
               $post =& get_post($attachment_id);
               $author_id = $post->post_author;
               $user = get_userdata($author_id);
               if ( !empty($user->user_nicename) )
                       $author_nicename = $user->user_nicename;
               $pattern = '/(\"]<img)/i';
               $author_link = '<a href="' . get_author_posts_url($author_id, $author_nicename) . '">$author_nicename</a>';
               $replacement = '<br /><a href=' . $author_link . '${1}';
               $html = preg_replace($pattern, $replacement, $html);
               return $html;
       }
       add_filter('image_send_to_editor', 'send_media_credit_to_editor', 10, 3);
       ```
   
 * However, the $html that I return is not used and the caption is not filtered 
   at all. However, if I replace the entire function with:
 *     ```
       function send_media_credit_to_editor($html, $attachment_id, $attachment) {
               $html = 'Hi';
               return $html;
       }
       ```
   
 * Then the caption is properly changed to be simply the word “Hi”. Why is my preg_replace
   not working and how can I get it to work?
 * Thanks,
    Scott

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Thread Starter [Scott Bressler](https://wordpress.org/support/users/sbressler/)
 * (@sbressler)
 * [16 years, 3 months ago](https://wordpress.org/support/topic/preg_replace-on-image-caption/#post-1399910)
 * To clarify and simplify a bit, I’m trying to add something to the end of the 
   caption that is displayed under the picture. So if the shortcode written to the
   editor were:
    `[caption id="attachment_5" align="aligncenter" width="300" caption
   ="This is a caption."]<img src="http://website.com/wp-content/uploads/2010/02/
   picture.jpg" alt="" title="" width="300" height="53" class="size-medium wp-image-
   5" />[/caption]` I want it to become, with the extra bit added to the end of 
   the caption text: `[caption id="attachment_5" align="aligncenter" width="300"
   caption="This is a caption. <br /><a href='http://www.link.com'>Link Text</a>"]
   <img src="http://website.com/wp-content/uploads/2010/02/picture.jpg" alt="" title
   ="" width="300" height="53" class="size-medium wp-image-5" />[/caption]`
 * I thought that this code should accomplish that:
 *     ```
       function change_caption($html, $attachment_id, $attachment) {
               $pattern = '/("]<img)/';
               $link = '<a href=\'http://www.link.com\''>Link Text</a>';
               $replacement = '<br />' . $link . '${1}';
               $html = preg_replace($pattern, $replacement, $html);
               return $html;
       }
       add_filter('image_send_to_editor', 'change_caption', 10, 3);
       ```
   
 * However, the above (much-simplified) filter doesn’t accomplish anything — the
   caption as it normally would be inserted is indeed inserted into the editor. 
   Thoughts as to why?
 * Thanks!
 *  Thread Starter [Scott Bressler](https://wordpress.org/support/users/sbressler/)
 * (@sbressler)
 * [16 years, 3 months ago](https://wordpress.org/support/topic/preg_replace-on-image-caption/#post-1399915)
 * Seems like I need to filter the caption shortcode instead…

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘preg_replace on image caption’ is closed to new replies.

## Tags

 * [caption](https://wordpress.org/support/topic-tag/caption/)
 * [image](https://wordpress.org/support/topic-tag/image/)
 * [image_send_to_editor](https://wordpress.org/support/topic-tag/image_send_to_editor/)
 * [media](https://wordpress.org/support/topic-tag/media/)
 * [preg_replace](https://wordpress.org/support/topic-tag/preg_replace/)

 * 2 replies
 * 1 participant
 * Last reply from: [Scott Bressler](https://wordpress.org/support/users/sbressler/)
 * Last activity: [16 years, 3 months ago](https://wordpress.org/support/topic/preg_replace-on-image-caption/#post-1399915)
 * Status: not resolved

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