MacOS safariブラウザでダウンロードコンテンツが欠損する件

    header("HTTP/1.1 200 OK", true, 200);
    header("Content-Type: application/octet-stream");
    header("Content-Disposition: attachment; filename=\"{$todayTimestamp}.pdf\"");
    readfile(DOCUMENT_DIR."/".$documentType);

    $documentBinary = file_get_contents(DOCUMENT_DIR."/".$documentType);
    header("HTTP/1.1 200 OK", true, 200);
    header("Content-Type: application/pdf");
    header("Content-Length: ".strlen($documentBinary));
    header("Content-Disposition: attachment; filename=\"{$todayTimestamp}.pdf\"");
    print($documentBinary);

//以下ソースをコメントアウト
//header("Content-Length: ".strlen($data));

// file_get_contents($path);をやめて
readline($path);