WP hooks navigation: Home/browse • Actions index • Filters index
To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 185 | if ( ! $update && isset( $_POST['user_login'] ) && ! validate_username( $_POST['user_login'] ) ) { |
| 186 | $errors->add( 'user_login', __( '<strong>Error</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ) ); |
| 187 | } |
| 188 | |
| 189 | if ( ! $update && username_exists( $user->user_login ) ) { |
| 190 | $errors->add( 'user_login', __( '<strong>Error</strong>: This username is already registered. Please choose another one.' ) ); |
| 191 | } |
| 192 | |
| 193 | /** This filter is documented in wp-includes/user.php */ |
| 194 | $illegal_logins = (array) apply_filters( 'illegal_user_logins', array() ); |
| 195 | |
| 196 | if ( in_array( strtolower( $user->user_login ), array_map( 'strtolower', $illegal_logins ), true ) ) { |
| 197 | $errors->add( 'invalid_username', __( '<strong>Error</strong>: Sorry, that username is not allowed.' ) ); |
| 198 | } |
| 199 | |
| 200 | /* checking email address */ |
| 201 | if ( empty( $user->user_email ) ) { |
| 202 | $errors->add( 'empty_email', __( '<strong>Error</strong>: Please enter an email address.' ), array( 'form-field' => 'email' ) ); |
| 203 | } elseif ( ! is_email( $user->user_email ) ) { |