: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace Smush\Core\Parser;
public function __construct( $css, $image_urls ) {
$this->image_urls = $image_urls;
public function get_css() {
public function get_image_urls() {
return $this->image_urls;
public function has_updates() {
foreach ( $this->image_urls as $image_url ) {
if ( $image_url->has_updates() ) {
public function get_updated() {
foreach ( $this->image_urls as $image_url ) {
if ( $image_url->has_updates() ) {
$image_url->get_previous_url(),
esc_url_raw( $image_url->get_url() ),