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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 |
|---|---|
| 161 | /** |
| 162 | * Fires before user profile update errors are returned. |
| 163 | * |
| 164 | * @since 2.8.0 |
| 165 | * |
| 166 | * @param array &$errors An array of user profile update errors, passed by reference. |
| 167 | * @param bool $update Whether this is a user update. |
| 168 | * @param WP_User &$user WP_User object, passed by reference. |
| 169 | */ |
| 170 | do_action_ref_array( 'user_profile_update_errors', array( &$errors, $update, &$user ) ); |
| 171 | |
| 172 | if ( $errors->get_error_codes() ) |
| 173 | return $errors; |
| 174 | |
| 175 | if ( $update ) { |
| 176 | $user_id = wp_update_user( $user ); |
| 177 | } else { |
| 178 | $user_id = wp_insert_user( $user ); |
| 179 | wp_new_user_notification( $user_id, isset( $_POST['send_password'] ) ? wp_unslash( $pass1 ) : '' ); |