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<?php
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 {
/**
* The tag format including placeholders.
*
* @var string
*/
protected $tag_format = '<link rel="canonical" href="%s" />';
/**
* The method of escaping to use.
*
* @var string
*/
protected $escaping = 'url';
/**
* Run the canonical content through the `wpseo_canonical` filter.
*
* @return string $canonical The filtered canonical.
*/
public function get() {
if ( \in_array( 'noindex', $this->presentation->robots, true ) ) {
return '';
}
/**
* Filter: 'wpseo_canonical' - Allow filtering of the canonical URL put out by Yoast SEO.
*
* @api 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 ) ) );
}
}
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