Export: Use BCP 47 language code for attribute xml:lang

The patch changes for example
 https://crh.wikipedia.org/wiki/Mahsus:Export/Ba%C5%9F_Saife
from
 xml:lang="crh-latn"
to
 xml:lang="crh-Latn"

Change-Id: I2fb218fe026c5ffee081fb8aaee7b154a8732bdc

diff --git a/includes/export/XmlDumpWriter.php b/includes/export/XmlDumpWriter.php
index a3ec66c..5cea50c 100644 (file)
--- a/includes/export/XmlDumpWriter.php
+++ b/includes/export/XmlDumpWriter.php
@@ -38,7 +38,7 @@ class XmlDumpWriter {
         * @return string
         */
        function openStream() {
-               global $wgLanguageCode;
+               global $wgContLang;
                $ver = WikiExporter::schemaVersion();
                return Xml::element( 'mediawiki', [
                        'xmlns'              => "http://www.mediawiki.org/xml/export-$ver/",
@@ -56,7 +56,7 @@ class XmlDumpWriter {
                        'xsi:schemaLocation' => "http://www.mediawiki.org/xml/export-$ver/ " .
                                "http://www.mediawiki.org/xml/export-$ver.xsd",
                        'version'            => $ver,
-                       'xml:lang'           => $wgLanguageCode ],
+                       'xml:lang'           => $wgContLang->getHtmlCode() ],
                        null ) .
                        "\n" .
                        $this->siteInfo();