Turn on maintenance mode before attempting to upgrade the active theme.

Hooked to the ‘upgrader_pre_install’ filter by Theme_Upgrader::upgrade() and Theme_Upgrader::bulk_upgrade().

$response bool|WP_Error Required

The installation response before the installation has started.

$theme array Required

Theme arguments.

bool|WP_Error The original $response parameter or WP_Error.

File: wp-admin/includes/class-theme-upgrader.php. View all references

public function current_before( $response, $theme ) {
	if ( is_wp_error( $response ) ) {
		return $response;
	}

	$theme = isset( $theme['theme'] ) ? $theme['theme'] : '';

	// Only run if active theme.
	if ( get_stylesheet() !== $theme ) {
		return $response;
	}

	// Change to maintenance mode. Bulk edit handles this separately.
	if ( ! $this->bulk ) {
		$this->maintenance_mode( true );
	}

	return $response;
}