exif 정보 여분필드 저장 속도

//    exif 날짜 bf_storage 여분 필드에저장.....
 
    $data_path = G5_DATA_PATH.'/file/'.$bo_table;
    $sql = " select * from g5_board_file where wr_id = '$wr_id' and bo_table = '$bo_table'";
    $qr = sql_query($sql);
    for ($z=0; $row=sql_fetch_array($qr); $z++) {
    $bf_files1 = $row['bf_file'];
    $bf_files2 = $data_path.'/'.$bf_files1;
    $exif = @exif_read_data($bf_files2);
        if (isset($exif[DateTimeOriginal])) {
        $sql = " update {$g5['board_file_table']}
            set bf_storage = '{$exif[DateTimeOriginal]}'
            where bo_table = '{$bo_table}'
            and wr_id = '{$wr_id}'
            and bf_no = '{$z}' ";
            sql_query($sql);
        }
    }
   
    //    exif 날짜 저장