authenticate filter-hook . WP 2.8.0

Filters whether a set of user login credentials are valid.

A WP_User object is returned if the credentials authenticate a user. WP_Error or null otherwise.

Usage

add_filter( 'authenticate', 'filter_function_name_6989', 10, 3 );
function filter_function_name_6989( $user, $username, $password ){
	// filter...

	return $user;
}

$user(null/WP_User/WP_Error)

WP_User if the user is authenticated. WP_Error or null otherwise.

$username(string)

Username or email address.

$password(string)

User password

Changelog

Where the hook is called

$user = apply_filters( 'authenticate', null, $username, $password );

Where the hook is used (in WP core)

add_filter( 'authenticate', 'wp_authenticate_username_password', 20, 3 );

add_filter( 'authenticate', 'wp_authenticate_email_password', 20, 3 );

add_filter( 'authenticate', 'wp_authenticate_spam_check', 99 );

add_filter( 'authenticate', 'wp_authenticate_cookie', 30, 3 );