do_action( 'preprocess_signup_form' ) Fires when the site sign-up form is sent. ContentsSource Changelog User Contributed Notes Source File: wp-signup.php. View all references do_action( 'preprocess_signup_form' ); View on Trac View on GitHub Top ↑Changelog Changelog Version Description 3.0.0 Introduced. Top ↑User Contributed Notes You must log in before being able to contribute a note or feedback.