Title: Update default value
Last modified: April 22, 2021

---

# Update default value

 *  Resolved [maven1129](https://wordpress.org/support/users/maven1129/)
 * (@maven1129)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/update-default-value/)
 * I’m trying to find a solution whereby custom fields default values are set based
   on other field values. For example, create a default value for Phone_link field
   from field Phone_number. Phone_link would not be editable, but instead would 
   be set from the value of Phone_number. When Phone_number is changed or edited,
   this Phone_link would need to be updated. I am yet to find a solution for this.
   Any capabilities in this plugin?

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [Konrad Chmielewski](https://wordpress.org/support/users/hwk-fr/)
 * (@hwk-fr)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/update-default-value/#post-14357073)
 * Hello,
 * Thanks for the feedback! You can set the `phone_link` as a [Hidden Input Field](https://www.acf-extended.com/features/fields/hidden-input),
   and then use the following code in order to update its value based on the `phone_number`
   field:
 *     ```
       add_filter('acf/update_value/name=phone_number', 'my_phone_number_update', 10, 3);
       function my_phone_number_update($value, $post_id, $field){
   
           // update phone_link
           update_field('phone_link', $value, $post_id);
   
           return $value;
   
       }
       ```
   
 * Please note that Phone Link must be above the Phone Number field in the Fields
   list, so the `update_field()` is triggered after it. Otherwise you can also use
   the [`acf/save_post`](https://www.advancedcustomfields.com/resources/acf-save_post/)
   hook combined with `update_field()`.
 * If you don’t want to use a Hidden Input field, you can use the regular ACF Text
   field, the `acf/update_value` hook will work the same. You can then set `phone_link`
   as disabled using the following code:
 *     ```
       add_filter('acf/prepare_field/name=phone_link', 'my_phone_link_prepare');
       function my_phone_link_prepare($field){
   
           $field['disabled'] = true;
   
           return $field;
   
       }
       ```
   
 * Please note that the `$field['disabled']` setting is not officially supported
   and only work with few simple fields like “Text” fields.
 * Have a nice day!
 * Regards.
 *  Thread Starter [maven1129](https://wordpress.org/support/users/maven1129/)
 * (@maven1129)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/update-default-value/#post-14358485)
 * Wow! Amazing support and thank YOU for the thorough, comprehensive reply. I will
   give this a go… I didn’t realize that I could put php into the field value field.
 * Just do it like this? I’d like to wrap it in a “tel:” link as well.
 * [⌊2021-04-23_19-21-06.jpg⌉⌊2021-04-23_19-21-06.jpg⌉[
 * I was always told that I would have to go in an edit each page it was used on,
   then save it, for the field to update. Are you saying that any time the page 
   is rendered, and this field is present on the page visibility sections, it would
   update the field that is actually in use on the page, or would I need to also
   include that hidden field in the content of the page somewhere?
    -  This reply was modified 5 years, 1 month ago by [maven1129](https://wordpress.org/support/users/maven1129/).
    -  This reply was modified 5 years, 1 month ago by [maven1129](https://wordpress.org/support/users/maven1129/).
 *  Plugin Author [Konrad Chmielewski](https://wordpress.org/support/users/hwk-fr/)
 * (@hwk-fr)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/update-default-value/#post-14358625)
 * Hello,
 * There was a misunderstanding, PHP in the UI won’t work, you should avoid doing
   that. The PHP script I posted has to go in your theme `functions.php` file. In
   your screenshot, your fields don’t have the same name as in your first post, 
   so you have to update the code like this:
 *     ```
       // In the hook name you need to set the "name=provider_phone_number" to the main phone field name
       add_filter('acf/update_value/name=provider_phone_number', 'my_phone_provider_update', 10, 3);
       function my_phone_provider_update($value, $post_id, $field){
   
           // Here you got to put the "Hidden" field name "provider_phone_number_copy"
           update_field('provider_phone_number_copy', $value, $post_id);
   
           return $value;
   
       }
       ```
   
 * See [`acf/update_value`](https://www.advancedcustomfields.com/resources/acf-update_value/)
   documentation for more information.
 * You’ll then have to go to each post and save the page so the `provider_phone_number_copy`
   get correctly updated.
 * With the code above in your `functions.php` file, every time the page is saved,
   both fields will have the same value.
 * Regards.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Update default value’ is closed to new replies.

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 * 3 replies
 * 2 participants
 * Last reply from: [Konrad Chmielewski](https://wordpress.org/support/users/hwk-fr/)
 * Last activity: [5 years, 1 month ago](https://wordpress.org/support/topic/update-default-value/#post-14358625)
 * Status: resolved