$code = strtolower( $code );
# Validate $code
- if( empty( $code ) || !preg_match( '/^[a-z-]+$/', $code ) || ( $code === 'qqq' ) ) {
+ if( empty( $code ) || !Language::isValidCode( $code ) || ( $code === 'qqq' ) ) {
wfDebug( "Invalid user language code\n" );
$code = $wgContLanguageCode;
}