在PHP下载中设置创建日期

我有一个PHP函数让用户下载文件。(代码中有一些自定义函数, maybe_redirect , validate_document , headers_no_cache 等等,但是你从名字和他们的行为中得到了灵感 准确地说 与问题无关。)

运行此操作时,结果文件的创建日期设置为当前日期和时间。PHP有没有办法为生成的文件设置该属性?

函数如下:

function fetch_file( $file, $force_download = false ) {
    $file = maybe_redirect( $file );
    if ( $DLfile = validate_document( $file ) ) {
        global $pconfig;
        $DLfile = htmlspecialchars( $DLfile );
        $type = mime_content_type( $DLfile );
        $chunksize = ( (int) $pconfig['misc']['download_chunk_size_mb'] ) * (1024 * 1024);
        $size = intval( sprintf( "%u", filesize($DLfile) ) );
        set_time_limit(300);

        headers_no_cache();
        header( 'Content-Type: ' . $type );
        header( 'Content-Length: ' . $size );

        if ( $force_download || $size > $chunksize ) {
            header( 'Content-Disposition: attachment; filename="' . basename( $DLfile ) . '"' );
        } else {
            header( 'Content-Disposition: filename="' . basename( $DLfile ) . '"' );
        }

        if( $size > $chunksize ) {
            // https://stackoverflow.com/a/21936954
            header( 'Content-Type: application/octet-stream' );
            header( 'Content-Transfer-Encoding: binary' );
            $handle = fopen( $DLfile, 'rb' );
            while ( ! feof($handle) ) {
                echo @fread($handle, $chunksize);
                ob_flush();
                flush();
            }
            fclose($handle);
        } else {
            readfile( $DLfile );
        }
        exit;
    } else {
        http404();
    }
}