: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace Yoast\WP\SEO\Presenters;
use Yoast\WP\SEO\Presentations\Indexable_Presentation;
* Presenter class for the canonical.
class Canonical_Presenter extends Abstract_Indexable_Tag_Presenter {
protected $key = 'canonical';
* The tag format including placeholders.
protected $tag_format = self::LINK_REL_HREF;
* The method of escaping to use.
protected $escaping = 'url';
* Run the canonical content through the `wpseo_canonical` filter.
* @return string The filtered canonical.
if ( \in_array( 'noindex', $this->presentation->robots, true ) ) {
* Filter: 'wpseo_canonical' - Allow filtering of the canonical URL put out by Yoast SEO.
* @param string $canonical The canonical URL.
* @param Indexable_Presentation $presentation The presentation of an indexable.
return \urldecode( (string) \trim( \apply_filters( 'wpseo_canonical', $this->presentation->canonical, $this->presentation ) ) );