: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace Smush\Core\Transform;
use Smush\Core\Controller;
use Smush\Core\Server_Utils;
use Smush\Core\Url_Utils;
class Transformation_Controller extends Controller {
public function __construct() {
$this->transformer = new Transformer();
$this->server_utils = new Server_Utils();
$this->register_action( 'template_redirect', array( $this, 'hook_transformation_method' ), 1 );
$this->register_filter( 'rest_pre_echo_response', array( $this, 'transform_rest_response' ), 10, 3 );
$this->register_filter( 'wp_smush_transform_url', array( $this->transformer, 'transform_url' ) );
public function should_run() {
public function hook_transformation_method() {
if ( ! $this->should_transform_page() ) {
ob_start( array( $this, 'transform_content' ) );
private function should_transform_page() {
$should_transform = ! is_customize_preview() &&
$this->is_allowed_request_method() &&
return apply_filters( 'wp_smush_should_transform_page', $should_transform );
private function is_allowed_request_method() {
$allowed = array( 'GET', 'HEAD' );
return in_array( $this->server_utils->get_request_method(), $allowed, true );
private function is_file_404() {
$request_uri = $this->server_utils->get_request_uri();
$extension = ( new Url_Utils() )->get_extension( $request_uri );
if ( empty( $extension ) ) {
$allowed_404_extensions = array(
return ! isset( $allowed_404_extensions[ $extension ] );
public function transform_content( $content ) {
if ( ! $this->should_parse_content( $content ) ) {
return $this->transformer->transform_content(
$this->server_utils->get_current_url()
private function should_parse_content( $content ) {
$should_parse = $this->is_html( $content );
return apply_filters( 'wp_smush_should_parse_content', $should_parse, $content );
private function is_html( $content ) {
return (bool) preg_match( '/<\s*\/\s*html\s*>/i', $content );
* @param $server \WP_REST_Server
* @param $request \WP_REST_Request
public function transform_rest_response( $response, $server, $request ) {
if ( ! $this->should_transform_rest( $response, $request ) ) {
return $this->transformer->transform_rest_response( $response, $request );
private function should_transform_rest( $response, $request ) {
$context = $request->get_param( 'context' );
$referer = $request->get_header( 'referer' );
$referer_from_admin = $referer && ( false !== strpos( $referer, admin_url() ) || false !== strpos( $referer, network_admin_url() ) );
$should_transform_rest = 'view' === $context && ! $referer_from_admin;
return apply_filters( 'wp_smush_should_transform_rest', $should_transform_rest, $response, $request );