$status = $req->execute();
if ( $status->isOK() ) {
- $mtime = wfTimestampOrNull( TS_UNIX, $req->getResponseHeader( 'Last-Modified' ) );
- $mtime = $mtime ?: false;
+ $lmod = $req->getResponseHeader( 'Last-Modified' );
+ $mtime = $lmod ? wfTimestamp( TS_UNIX, $lmod ) : false;
return $req->getContent();
} else {