apply_filters( 'signup_blog_init', array $signup_blog_defaults )

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

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) A WP_Error object with possible errors relevant to new site creation variables.

Used By	Description
wp-signup.php: signup_blog()	Shows a form for a user or visitor to sign up for a new site.

Version	Description
3.0.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/signup_blog_init