Changeset 5570

Timestamp:

06/15/2017 12:57:31 PM (9 years ago)

Author:

Otto42

Message:

Plugin Directory: Move hreflang from the theme into the plugin-directory plugin, change it to only show translated languages instead of all languages, in order to make google behave better. Props @joostdevalk, @otto42. Fixes #2870

Location:

sites/trunk/wordpress.org/public_html/wp-content/plugins/plugin-directory

Files:

• class-plugin-directory.php (modified) (1 diff)
• class-template.php (modified) (1 diff)

sites/trunk/wordpress.org/public_html/wp-content/plugins/plugin-directory/class-plugin-directory.php

@@ -44 +44 @@
                 add_filter( 'the_content', array( $this, 'filter_rel_nofollow' ) );
                 add_action( 'wp_head', array( Template::class, 'json_ld_schema' ), 1 );
+                add_action( 'wp_head', array( Template::class, 'hreflang_link_attributes' ), 2 );
 
                 // Cron tasks.

sites/trunk/wordpress.org/public_html/wp-content/plugins/plugin-directory/class-template.php

@@ -630 +630 @@
                 ), home_url( 'wp-json/plugins/v1/plugin/' . $post->post_name . '/favorite' ) );
         }
+
+        /**
+         * Adds hreflang link attributes to WordPress.org pages.
+         *
+         * @link https://support.google.com/webmasters/answer/189077?hl=en Use hreflang for language and regional URLs.
+         * @link https://sites.google.com/site/webmasterhelpforum/en/faq-internationalisation FAQ: Internationalisation.
+         */
+        public function hreflang_link_attributes() {
+                global $wpdb;
+
+                wp_cache_add_global_groups( array( 'locale-associations' ) );
+
+                if ( false === ( $sites = wp_cache_get( 'local-sites', 'locale-associations' ) ) ) {
+
+                        // get subdomain/locale associations
+                        $subdomains = $wpdb->get_results( 'SELECT locale, subdomain FROM locales', OBJECT_K ); 
+
+                        $sites = Plugin_I18n::instance()->get_locales();
+
+                        require_once GLOTPRESS_LOCALES_PATH;
+
+                        foreach ( $sites as $key => $site ) {
+                                $gp_locale = \GP_Locales::by_field( 'wp_locale', $site->wp_locale );
+                                if ( empty( $gp_locale ) ) {
+                                        unset( $sites[ $key ] );
+                                        continue;
+                                }
+
+                                $sites[ $key ]->subdomain = $subdomains[ $site->wp_locale ]->subdomain;
+
+                                // Note that Google only supports ISO 639-1 codes.
+                                if ( isset( $gp_locale->lang_code_iso_639_1 ) && isset( $gp_locale->country_code ) ) {
+                                        $hreflang = $gp_locale->lang_code_iso_639_1 . '-' . $gp_locale->country_code;
+                                } elseif ( isset( $gp_locale->lang_code_iso_639_1 ) ) {
+                                        $hreflang = $gp_locale->lang_code_iso_639_1;
+                                } elseif ( isset( $gp_locale->lang_code_iso_639_2 ) ) {
+                                        $hreflang = $gp_locale->lang_code_iso_639_2;
+                                } elseif ( isset( $gp_locale->lang_code_iso_639_3 ) ) {
+                                        $hreflang = $gp_locale->lang_code_iso_639_3;
+                                }
+
+                                if ( $hreflang ) {
+                                        $sites[ $key ]->hreflang = strtolower( $hreflang );
+                                } else {
+                                        unset( $sites[ $key ] );
+                                }
+                        }
+
+                        // Add en_US to the list of sites.
+                        $sites['en_US'] = (object) array(
+                                'locale'    => 'en_US',
+                                'hreflang'  => 'en',
+                                'subdomain' => ''
+                        );
+
+                        uasort( $sites, function( $a, $b ) {
+                                return strcasecmp( $a->hreflang, $b->hreflang );
+                        } );
+
+
+                        wp_cache_set( 'local-sites', $sites, 'locale-associations' );
+                }
+
+                foreach ( $sites as $site ) {
+                        $url = sprintf(
+                                'https://%swordpress.org%s',
+                                $site->subdomain ? "{$site->subdomain}." : '',
+                                $_SERVER[ 'REQUEST_URI' ]
+                        );
+
+                        printf(
+                                '<link rel="alternate" href="%s" hreflang="%s" />' . "\n",
+                                esc_url( $url ),
+                                esc_attr( $site->hreflang )
+                        );
+                }
+        }
 }