Fallback for missing Images when running WordPress via Valet

<?php
class LocalValetDriver extends WordPressValetDriver {
    /**
     * Determine if the incoming request is for a static file.
     *
     * @param  string $sitePath
     * @param  string $siteName
     * @param  string $uri
     *
     * @return string|false
     */
    public function isStaticFile( $sitePath, $siteName, $uri ) {
        if ( ( stripos( $uri, 'wp-admin' ) !== false || stripos( $uri, 'wp-content' ) !== false || stripos( $uri, 'wp-includes' ) !== false ) ) {
            $staticFilePath = $sitePath . substr( $uri, stripos( $uri, '/wp-' ) );
        } else {
            $staticFilePath = $sitePath . $uri;
        }

        if ( $this->isActualFile( $staticFilePath ) ) {
            return $staticFilePath;
        } else if ( preg_match( "/\.(js|css|png|jpe?g|gif|ico|svg)$/", $uri ) ) {
            header( "Location: https://www.production-server.nl{$uri}", false, 301 );
            exit;
        }

        return false;
    }
}