데이터 업데이트시 중복처리문의

데이터 업데이트시 $wr_link1 와 $wr_link2 가 중복이면 업데이트되지않게하려고합니다.
어디를만져야되는지요?


// 변수 정리
$bo_table = $newpost[bo_table];
$write_table = $g5[write_prefix] . $bo_table;
$wr_num = get_next_num($write_table);
$ca_name = addslashes($ca_name);
$html = "html1"; // 이 값은 필요에 맞게 설정
$secret = "";
$mail = "";
$wr_subject = addslashes(trim($newpost[wr_subject]));
$wr_content = addslashes(trim($newpost[wr_content]));
if(!$wr_subject) return "error: 글 제목이 없습니다.";
if(!$wr_content) return "error: 글 내용이 없습니다.";
$mb_id = $mb[mb_id];
$wr_password = $mb[mb_password];
$wr_name = $bo[bo_use_name] ? $mb[mb_name] : $mb[mb_nick];
for($i=1; $i<=10; $i++) { // 확장필드도 입력
$wr = "wr_{$i}";
${$wr} = addslashes($newpost[$wr]);
}
$wr_link1 = $newpost[wr_link1];
$wr_link2 = $newpost[wr_link2];
$wr_trackback = $newpost[wr_trackback];

// 글 입력하기
$sql = " insert into $write_table
set wr_num = '$wr_num',
wr_reply = '',
wr_comment = 0,
ca_name = '$ca_name',
wr_option = '$html,$secret,$mail',
wr_subject = '$wr_subject',
wr_content = '$wr_content',
wr_link1 = '$wr_link1',
wr_link2 = '$wr_link2',
wr_link1_hit = 0,
wr_link2_hit = 0,
wr_trackback = '$wr_trackback',
wr_hit = 0,
wr_good = 0,
wr_nogood = 0,
mb_id = '$mb_id',
wr_password = '$wr_password',
wr_name = '$wr_name',
wr_email = '$wr_email',
wr_homepage = '$wr_homepage',
wr_datetime = '".G5_TIME_YMDHIS."',
wr_last = '".G5_TIME_YMDHIS."',
wr_ip = '$_SERVER[REMOTE_ADDR]',
wr_1 = '$wr_1',
wr_2 = '$wr_2',
wr_3 = '$wr_3',
wr_4 = '$wr_4',
wr_5 = '$wr_5',
wr_6 = '$wr_6',
wr_7 = '$wr_7',
wr_8 = '$wr_8',
wr_9 = '$wr_9',
wr_10 = '$wr_10' ";
sql_query($sql);
$wr_id = mysql_insert_id();

// 부모 아이디에 UPDATE
sql_query(" update $write_table set wr_parent = '$wr_id' where wr_id = '$wr_id' ");

// 최신글 삽입
sql_query(" insert into $g5[board_new_table] ( bo_table, wr_id, wr_parent, bn_datetime, mb_id ) values ( '$bo_table', '$wr_id', '$wr_id', '$g5[time_ymdhis]', '$mb[mb_id]' ) ");

// 게시글 1 증가
sql_query("update $g5[board_table] set bo_count_write = bo_count_write + 1 where bo_table = '$bo_table'");

// 포인트 발생
insert_point($member[mb_id], $board[bo_write_point], "$bo[bo_subject] $wr_id 글쓰기", $bo_table, $wr_id, '쓰기');

// 성공하면 글번호를 return;
return $wr_id;
}
?>