and attributes found in an XML dump. * * Although exported XML dumps have contained a map of namespace IDs to names * since MW 1.5, the importer used to completely ignore the tag * before MW 1.25. It is therefore possible that custom XML dumps (i.e. not * generated by Special:Export) have been created without this metadata. * As a result, this code falls back to using namespace data for the local * wiki (similar to buggy pre-1.25 behaviour) if $ns is not supplied. * * @param string $title The page title * @param int|null $ns The namespace ID, or null if this data is not available * @return ForeignTitle */ public function createForeignTitle( $title, $ns = null ) { $pieces = explode( ':', $title, 2 ); global $wgContLang; /** * Can we assume that the part of the page title before the colon is a * namespace name? * * XML export schema version 0.5 and earlier (MW 1.18 and earlier) does not * contain a tag, so we need to be able to handle that case. * * If we know the namespace ID, we assume a non-zero namespace ID means * the ':' sets off a valid namespace name. If we don't know the namespace * ID, we fall back to using the local wiki's namespace names to resolve * this -- better than nothing, and mimics the old crappy behavior */ $isNamespacePartValid = is_null( $ns ) ? ( $wgContLang->getNsIndex( $pieces[0] ) !== false ) : $ns != 0; if ( count( $pieces ) === 2 && $isNamespacePartValid ) { list( $namespaceName, $pageName ) = $pieces; } else { $namespaceName = ''; $pageName = $title; } return new ForeignTitle( $ns, $namespaceName, $pageName ); } }