WordPress at a glance
filter is not described

wp_signup_location filter-hook . WP 3.0.0

Filters the Multisite sign up URL.

Usage

add_filter( 'wp_signup_location', 'filter_function_name_2700' );
function filter_function_name_2700( $sign_up_url ){
	// filter...

	return $sign_up_url;
}
$sign_up_url(string)
The sign up URL.

Where the hook is called

In file: /wp-login.php
wp_signup_location
wp-login.php 746
wp_redirect( apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ) );
wp-admin/my-sites.php 65
$sign_up_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) );
wp-includes/canonical.php 349
$redirect_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) );

Where the hook is used (in WP core)

Does not used.