global $wgExtraNamespaces, $wgCanonicalNamespaceNames;
$namespaces = array( NS_MAIN => '' ) + $wgCanonicalNamespaceNames;
if ( is_array( $wgExtraNamespaces ) ) {
global $wgExtraNamespaces, $wgCanonicalNamespaceNames;
$namespaces = array( NS_MAIN => '' ) + $wgCanonicalNamespaceNames;
if ( is_array( $wgExtraNamespaces ) ) {