Changeset 2909 for sites/trunk/wordpress.org/public_html/wp-content/plugins/theme-directory/theme-directory.php

Timestamp:

04/06/2016 03:48:34 PM (10 years ago)

Author:

ocean90

Message:

Theme Directory: Add hreflang link attributes.

Same code is already used for 2 months in the plugin directory.

See #990.

File:

• sites/trunk/wordpress.org/public_html/wp-content/plugins/theme-directory/theme-directory.php (modified) (1 diff)

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

@@ -1027 +1027 @@
 
 /**
+ * Adds hreflang link attributes to theme 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
+ */
+function wporg_themes_add_hreflang_link_attributes() {
+        $sites = wp_cache_get( 'local-sites', 'wporg-theme-directory' );
+
+        if ( false === $sites ) {
+                global $wpdb;
+                $sites = $wpdb->get_results( 'SELECT locale, subdomain FROM locales', OBJECT_K );
+                if ( ! $sites ) {
+                        return;
+                }
+
+                require_once GLOTPRESS_LOCALES_PATH;
+
+                foreach ( $sites as $site ) {
+                        $gp_locale = GP_Locales::by_field( 'wp_locale', $site->locale );
+                        if ( ! $gp_locale ) {
+                                unset( $sites[ $site->locale ] );
+                                continue;
+                        }
+
+                        // 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[ $site->locale ]->hreflang = strtolower( $hreflang );
+                        } else {
+                                unset( $sites[ $site->locale ] );
+                        }
+                }
+
+                // 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, 'wporg-theme-directory', DAY_IN_SECONDS );
+        }
+
+        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" />',
+                        esc_url( $url ),
+                        esc_attr( $site->hreflang )
+                );
+        }
+        echo "\n";
+}
+add_action( 'wp_head', 'wporg_themes_add_hreflang_link_attributes' );
+
+/**
  * Filter the URLs to use the current localized domain name, rather than WordPress.org.
  *