아래 구문이 한줄 한줄 어떤 의미인지 설명 좀 해주세요 ! 채택완료

$list = array();

$idx = 0;

$rowspan = array();

$sql = "select * from $g4[group_table] where gr_use_not = '' and gr_only_admin = '' order by gr_order, gr_id";

$qry = sql_query($sql);

while ($row = sql_fetch_array($qry)) {

    $rowspan[$row[gr_id]] = 0;

    $sql2 = "select * from $mw[menu_middle_table] where gr_id = '$row[gr_id]' and mm_only_admin = '' order by mm_order, mm_id";

    $qry2 = sql_query($sql2);

    while ($row2 = sql_fetch_array($qry2)) {

$sql3 = "select * from $mw[menu_small_table] where mm_id = '$row2[mm_id]' and bo_table <> '' and ms_only_admin = '' order by ms_order, ms_id";

$qry3 = sql_query($sql3);

while ($row3 = sql_fetch_array($qry3)) {

    $sql4 = "select * from $g4[board_table] where bo_table = '$row3[bo_table]' ";

    $row4 = sql_fetch($sql4);

    if ($row4[bo_read_level] >= 10 && $row4[bo_write_level] >= 10 &&$row4[bo_comment_level] >= 10 && $row4[bo_download_level] >= 10) continue;

    $list[$idx] = $row4; 

    $list[$idx][href] = "$g4[bbs_path]/board.php?bo_table=$row4[bo_table]";

    $list[$idx][gr_id] = $row[gr_id];

    $list[$idx][gr_subject] = $row[gr_subject];

    $list[$idx][ms_name] = $row3[ms_name];

    //if ($row4[bo_read_level] == 1) $list[$idx][bo_read_point] = 0;

    //if ($row4[bo_download_level] == 1) $list[$idx][bo_download_point] = 0;

    //if ($row4[bo_write_level] == 1) $list[$idx][bo_write_point] = 0;

    //if ($row4[bo_comment_level] == 1) $list[$idx][bo_comment_point] = 0;

    $idx++;

    $rowspan[$row[gr_id]] += 1;

}

    }

}

$total_count = sizeof($list);