diff --git src/bp-messages/actions/notices.php src/bp-messages/actions/notices.php
index 8a70e56cb..d39a3811a 100644
--- src/bp-messages/actions/notices.php
+++ src/bp-messages/actions/notices.php
@@ -91,4 +91,48 @@ function bp_messages_action_edit_notice() {
bp_core_redirect( $redirect_to );
}
-add_action( 'bp_actions', 'bp_messages_action_edit_notice' );
\ No newline at end of file
+add_action( 'bp_actions', 'bp_messages_action_edit_notice' );
+
+/**
+ * Handle user dismissal of sitewide notices.
+ *
+ * @since 9.0.0
+ *
+ * @return bool False on failure.
+ */
+function bp_messages_action_dismiss_notice() {
+
+ // Bail if not viewing a notice dismissal URL.
+ if ( ! bp_is_messages_component() || ! bp_is_current_action( 'notices' ) || 'dismiss' !== sanitize_key( bp_action_variable( 0 ) ) ) {
+ return false;
+ }
+
+ // Bail if the current user isn't logged in.
+ if ( ! is_user_logged_in() ) {
+ return false;
+ }
+
+ // Check the nonce.
+ check_admin_referer( 'messages_dismiss_notice' );
+
+ // Dismiss the notice.
+ $success = bp_messages_dismiss_sitewide_notice();
+
+ // User feedback.
+ if ( $success ) {
+ $feedback = __( 'Notice has been dismissed.', 'buddypress' );
+ $type = 'success';
+ } else {
+ $feedback = __( 'There was a problem dismissing the notice.', 'buddypress');
+ $type = 'error';
+ }
+
+ // Add feedback message.
+ bp_core_add_message( $feedback, $type );
+
+ // Redirect.
+ $redirect_to = trailingslashit( bp_loggedin_user_domain() . bp_get_messages_slug() );
+
+ bp_core_redirect( $redirect_to );
+}
+add_action( 'bp_actions', 'bp_messages_action_dismiss_notice' );
diff --git src/bp-messages/bp-messages-functions.php src/bp-messages/bp-messages-functions.php
index 5cd08b510..07b45fb3b 100644
--- src/bp-messages/bp-messages-functions.php
+++ src/bp-messages/bp-messages-functions.php
@@ -739,3 +739,56 @@ function bp_messages_personal_data_exporter( $email_address, $page ) {
'done' => true,
);
}
+
+/**
+ * Dismiss a sitewide notice for a user.
+ *
+ * @since 9.0.0
+ *
+ * @param int $user_id ID of the user to dismiss the notice for.
+ * Defaults to the logged-in user.
+ * @param int $notice_id ID of the notice to be dismissed.
+ * Defaults to the currently active notice.
+ * @return bool False on failure, true if notice is dismissed
+ * (or was already dismissed).
+ */
+function bp_messages_dismiss_sitewide_notice( $user_id = 0, $notice_id = 0 ) {
+ $retval = false;
+ if ( ! $user_id ) {
+ $user_id = bp_loggedin_user_id();
+ }
+ // Bail if no user is set.
+ if ( ! $user_id ) {
+ return $retval;
+ }
+
+ if ( $notice_id ) {
+ $notice = new BP_Messages_Notice( $notice_id );
+ } else {
+ $notice = BP_Messages_Notice::get_active();
+ }
+ // Bail if no notice is set.
+ if ( empty( $notice->id ) ) {
+ return $retval;
+ }
+
+ // Fetch the user's closed notices and add the new item.
+ $closed_notices = bp_get_user_meta( $user_id, 'closed_notices', true );
+ if ( empty( $closed_notices ) || ! is_array( $closed_notices ) ) {
+ $closed_notices = array();
+ }
+
+ if ( in_array( (int) $notice->id, $closed_notices, true ) ) {
+ // The notice has already been dismissed, so there's nothing to do.
+ $retval = true;
+ } else {
+ // Add the notice to the closed_notices meta.
+ $closed_notices[] = (int) $notice->id;
+ $closed_notices = array_map( 'absint', array_unique( $closed_notices ) );
+ $success = bp_update_user_meta( $user_id, 'closed_notices', $closed_notices );
+ // The return value from update_user_meta() could be an integer or a boolean.
+ $retval = (bool) $success;
+ }
+
+ return $retval;
+}
diff --git src/bp-messages/bp-messages-template.php src/bp-messages/bp-messages-template.php
index d6971563f..28fd25e9d 100644
--- src/bp-messages/bp-messages-template.php
+++ src/bp-messages/bp-messages-template.php
@@ -1310,6 +1310,35 @@ function bp_message_activate_deactivate_text() {
return apply_filters( 'bp_message_activate_deactivate_text', $text );
}
+/**
+ * Output the URL for dismissing the current notice for the current user.
+ *
+ * @since 9.0.0
+ * @return string URL for dismissing the current notice for the current user.
+ */
+function bp_message_notice_dismiss_link() {
+ echo esc_url( bp_get_message_notice_dismiss_link() );
+}
+ /**
+ * Get the URL for dismissing the current notice for the current user.
+ *
+ * @since 9.0.0
+ * @return string URL for dismissing the current notice for the current user.
+ */
+ function bp_get_message_notice_dismiss_link() {
+
+ $link = wp_nonce_url( trailingslashit( bp_loggedin_user_domain() . bp_get_messages_slug() . '/notices/dismiss/' ), 'messages_dismiss_notice' );
+
+ /**
+ * Filters the URL for dismissing the current notice for the current user.
+ *
+ * @since 9.0.0
+ *
+ * @param string $link URL for dismissing the current notice.
+ */
+ return apply_filters( 'bp_get_message_notice_dismiss_link', $link );
+ }
+
/**
* Output the messages component slug.
*
@@ -1359,7 +1388,7 @@ function bp_message_get_notices() {
?>
diff --git src/bp-templates/bp-legacy/buddypress-functions.php src/bp-templates/bp-legacy/buddypress-functions.php
index c27a6597d..2316ab487 100644
--- src/bp-templates/bp-legacy/buddypress-functions.php
+++ src/bp-templates/bp-legacy/buddypress-functions.php
@@ -1623,15 +1623,7 @@ function bp_legacy_theme_ajax_close_notice() {
echo "-1" . __( 'There was a problem closing the notice.', 'buddypress' ) . '
' . __( 'Sitewide notice dismissed', 'buddypress' ) . '
' . __( 'There was a problem dismissing that sitewide notice', 'buddypress' ) . '