: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace Yoast\WP\SEO\Presenters\Debug;
use Yoast\WP\SEO\Presenters\Abstract_Indexable_Presenter;
* Presenter class for the debug open marker.
final class Marker_Open_Presenter extends Abstract_Indexable_Presenter {
* Returns the debug close marker.
* @return string The debug close marker.
public function present() {
* Filter: 'wpseo_debug_markers' - Allow disabling the debug markers.
* @param bool $show_markers True when the debug markers should be shown.
if ( ! \apply_filters( 'wpseo_debug_markers', true ) ) {
$version_info = 'v' . \WPSEO_VERSION;
if ( $this->helpers->product->is_premium() ) {
$version_info = $this->construct_version_info();
'<!-- This site is optimized with the %1$s %2$s - https://yoast.com/wordpress/plugins/seo/ -->',
\esc_html( $this->helpers->product->get_name() ),
* Gets the plugin version information, including the free version if Premium is used.
* @return string The constructed version information.
private function construct_version_info() {
* Filter: 'wpseo_hide_version' - can be used to hide the Yoast SEO version in the debug marker (only available in Yoast SEO Premium).
* @param bool $hide_version
if ( \apply_filters( 'wpseo_hide_version', false ) ) {
return 'v' . \WPSEO_PREMIUM_VERSION . ' (Yoast SEO v' . \WPSEO_VERSION . ')';
* Gets the raw value of a presentation.
* @return string The raw value.