Title: signup_blog_init
Published: April 25, 2014
Last modified: May 20, 2026

---

# apply_filters( ‘signup_blog_init’, array $signup_blog_defaults )

## In this article

 * [Parameters](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#parameters)
 * [Source](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#wp--skip-link--target)

Filters the default site creation variables for the site sign-up form.

## 󠀁[Parameters](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#parameters)󠁿

 `$signup_blog_defaults`array

An array of default site creation variables.

 * `user_name` string
 * The user username.
 * `user_email` string
 * The user email address.
 * `blogname` string
 * The blogname.
 * `blog_title` string
 * The title of the site.
 * `errors` [WP_Error](https://developer.wordpress.org/reference/classes/wp_error/)
 * A [WP_Error](https://developer.wordpress.org/reference/classes/wp_error/) object
   with possible errors relevant to new site creation variables.

## 󠀁[Source](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#source)󠁿

    ```php
    $filtered_results = apply_filters( 'signup_blog_init', $signup_blog_defaults );
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-signup.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-signup.php#L766)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-signup.php#L766-L766)

## 󠀁[Related](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#related)󠁿

| Used by | Description | 
| [signup_blog()](https://developer.wordpress.org/reference/functions/signup_blog/)`wp-signup.php` |

Shows a form for a user or visitor to sign up for a new site.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/hooks/signup_blog_init/?output_format=md#changelog)󠁿

| Version | Description | 
| [3.0.0](https://developer.wordpress.org/reference/since/3.0.0/) | Introduced. |

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