$symbolc = array(
"-","0","1","2","3","4","5","6","7","8","9","A","B","C","D","E",
"F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U",
"V","W","X","Y","Z","_","a","b","c","d","e","f","g","h","i","j",
"k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"
);

if($m[name]){$_GET['1'] = 1;}else{$_GET['1'] = 0;}　名前削除
if($m[mail]){$_GET['2'] = 1;}else{$_GET['2'] = 0;}　メール欄削除
if($m[date]){$_GET['3'] = 1;}else{$_GET['3'] = 0;}　日付削除
if($m[host]){$_GET['4'] = 1;}else{$_GET['4'] = 0;}　ID削除
if($m[link]){$_GET['5'] = 1;}else{$_GET['5'] = 0;}　外部リンク削除
if($m[form]){$_GET['6'] = 1;}else{$_GET['6'] = 0;}　検索窓削除
if($m[next]){$_GET['7'] = 1;}else{$_GET['7'] = 0;}　レス既読省略
if($m[star]){$_GET['8'] = 1;}else{$_GET['8'] = 0;}　★色分け
if($m[menu]){$_GET['9'] = 1;}else{$_GET['9'] = 0;}　ime.nu
if($m[pret]){$_GET['a'] = 1;}else{$_GET['a'] = 0;}　<pre>タグ整形
if($m[cook]){$_GET['b'] = 1;}else{$_GET['b'] = 0;}　自動しおり
if($m[writ]){$_GET['c'] = 1;}else{$_GET['c'] = 0;}　書き込み保存
if($m[copy]){$_GET['d'] = 1;}else{$_GET['d'] = 0;}　メール欄コピー
if($m[jump]){$_GET['e'] = 1;}else{$_GET['e'] = 0;}　ページ内レスリンク
if($m[0017]){$_GET['f'] = 1;}else{$_GET['f'] = 0;}　デフォルトAAS（othersのみ）

$letter_0 = bindec($_GET['6'] . $_GET['5'] . $_GET['4'] . $_GET['3'] . $_GET['2'] . $_GET['1']);
$letter_1 = bindec($_GET['c'] . $_GET['b'] . $_GET['a'] . $_GET['9'] . $_GET['8'] . $_GET['7']);
$letter_2 = bindec($_GET['i'] . $_GET['h'] . $_GET['g'] . $_GET['f'] . $_GET['e'] . $_GET['d']);
$letter_3 = bindec($_GET['c'] . $_GET['b'] . $_GET['a'] . 1 . $_GET['8'] . $_GET['7']);

if($symbol[$letter_2] != "-"){
$mod_nomal = $symbolc[$letter_2];
}
$mod_imenu = $symbol[$letter_0] . $symbol[$letter_3] . $mod_nomal;
if($mod_nomal != "" || $symbolc[$letter_1] != "-"){
$mod_nomal = $symbolc[$letter_1] . $mod_nomal;
}
if($mod_nomal != "" || $symbol[$letter_0]){
$mod_nomal = $symbolc[$letter_0] . $mod_nomal;
}

c.2chの設定はこんな感じで行っています。