wordpress-seo / src / presenters / rel-prev-presenter.php

rel-prev-presenter.php in Yoast SEO – Advanced SEO with real-time guidance and built-in AI 18.3, at src/presenters/rel-prev-presenter.php

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1	<?php
2
3	namespace Yoast\WP\SEO\Presenters;
4
5	/**
6	* Presenter class for the rel prev meta tag.
7	*/
8	class Rel_Prev_Presenter extends Abstract_Indexable_Tag_Presenter {
9
10	/**
11	* The tag key name.
12	*
13	* @var string
14	*/
15	protected $key = 'prev';
16
17	/**
18	* The tag format including placeholders.
19	*
20	* @var string
21	*/
22	protected $tag_format = self::LINK_REL_HREF;
23
24	/**
25	* The method of escaping to use.
26	*
27	* @var string
28	*/
29	protected $escaping = 'url';
30
31	/**
32	* Returns the rel prev meta tag.
33	*
34	* @param bool $output_tag Optional. Whether or not to output the HTML tag. Defaults to true.
35	*
36	* @return string The rel prev tag.
37	*/
38	public function present( $output_tag = true ) {
39	$output = parent::present();
40
41	if ( ! empty( $output ) ) {
42	/**
43	* Filter: 'wpseo_prev_rel_link' - Allow changing link rel output by Yoast SEO.
44	*
45	* @api string $unsigned The full `<link` element.
46	*/
47	return \apply_filters( 'wpseo_prev_rel_link', $output );
48	}
49
50	return '';
51	}
52
53	/**
54	* Run the rel prev content through the `wpseo_adjacent_rel_url` filter.
55	*
56	* @return string The filtered adjacent link.
57	*/
58	public function get() {
59	if ( \in_array( 'noindex', $this->presentation->robots, true ) ) {
60	return '';
61	}
62
63	/**
64	* Filter: 'wpseo_adjacent_rel_url' - Allow filtering of the rel prev URL put out by Yoast SEO.
65	*
66	* @api string $canonical The rel prev URL.
67	*
68	* @param string $rel Link relationship, prev or next.
69	*/
70	return (string) \trim( \apply_filters( 'wpseo_adjacent_rel_url', $this->presentation->rel_prev, 'prev', $this->presentation ) );
71	}
72	}
73