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<?php
/**
* @package WP Subtitle
* @subpackage WordPress SEO
*
* @since 3.1
*
* Compatibility for the Yoast SEO plugin:
* https://wordpress.org/plugins/wordpress-seo/
*
* Adds support for a `%%wps_subtitle%%` placeholder to include
* the subtitle in browser titles and meta descriptions.
*
* Also adds `%%wps_subtitle_before_sep%%` and `%%wps_subtitle_after_sep%%`.
* These can be used to add seperators before/after the subtitle. If there
* is no subtitle set these placeholders will not be output.
*
* The seperator placeholders can be customized using the `wps_subtitle_seo_before_sep`
* and `wps_subtitle_seo_after_sep` filters.
*
* The seperator placeholders include a 'space' either side by default. This means that
* you should create your title template with no whitespace around the seperator placeholders.
* It allows you to customize the seperators to include commas and butt the seperator up to
* the preceding/following text.
*
* e.g. If '%%wps_subtitle_before_sep%%' is set to ', ':
* `%%title%%%%wps_subtitle_before_sep%%%%wps_subtitle%% %%sep%% %%sitename%%`
* "Title, Subtitle - Sitename"
*/
class WPSubtitle_WPSEO {
/**
* Constructor
*
* @since 3.1
*
* @internal Do not create multiple instances.
*/
public function __construct() {
add_filter( 'wpseo_replacements', array( $this, 'add_wpseo_replacements' ) );
}
/**
* Add SEO Replacements
*
* @since 3.1
*
* @param array $replacements SEO replacements.
* @return array Filtered replacements.
*
* @internal Called via the `wpseo_replacements` filter.
*/
public function add_wpseo_replacements( $replacements ) {
global $post;
$wp_subtitle = new WP_Subtitle( $post );
$subtitle = $wp_subtitle->get_subtitle();
$replacements['%%wps_subtitle%%'] = $subtitle;
$replacements['%%wps_subtitle_before_sep%%'] = '';
$replacements['%%wps_subtitle_after_sep%%'] = '';
if ( ! empty( $subtitle ) ) {
$sep = isset( $replacements['%%sep%%'] ) ? ' ' . $replacements['%%sep%%'] . ' ' : ' - ';
$replacements['%%wps_subtitle_before_sep%%'] = apply_filters( 'wps_subtitle_seo_before_sep', $sep );
$replacements['%%wps_subtitle_after_sep%%'] = apply_filters( 'wps_subtitle_seo_after_sep', $sep );
}
return $replacements;
}
}