基于进制转换的

<?
//made by huyang @2005-01-20||11-04-06
##用n进位制到m进位制
##0~9A-Z，最多可理解为36进制范围
print'<title>加密解密法</title>';
class carry
  {
    function carry($n,$m)
      {
 $this->n=$n;
 $this->m=$m;
 $this->chn['0']=0;
 $this->chn['1']=1;
 $this->chn['2']=2;
 $this->chn['3']=3;
 $this->chn['4']=4;
        $this->chn['5']=5;
        $this->chn['6']=6;
        $this->chn['7']=7;
        $this->chn['8']=8;
        $this->chn['9']=9;
        $this->chn['A']=10;
        $this->chn['B']=11;
        $this->chn['C']=12;
        $this->chn['D']=13;
        $this->chn['E']=14;
        $this->chn['F']=15;
        $this->chn['G']=16;
        $this->chn['H']=17;
        $this->chn['I']=18;
        $this->chn['J']=19;
        $this->chn['K']=20;
        $this->chn['L']=21;
        $this->chn['M']=22;
        $this->chn['N']=23;
        $this->chn['O']=24;
        $this->chn['P']=25;
        $this->chn['Q']=26;
        $this->chn['R']=27;
        $this->chn['S']=28;
        $this->chn['T']=29;
        $this->chn['U']=30;
        $this->chn['V']=31;
        $this->chn['W']=32;
        $this->chn['X']=33;
        $this->chn['Y']=34;
        $this->chn['Z']=35;
        $this->cn[0]='0';
        $this->cn[1]='1';
        $this->cn[2]='2';
        $this->cn[3]='3';
        $this->cn[4]='4';
        $this->cn[5]='5';
        $this->cn[6]='6';
        $this->cn[7]='7';
        $this->cn[8]='8';
        $this->cn[9]='9';
        $this->cn[10]='A';
        $this->cn[11]='B';
        $this->cn[12]='C';
        $this->cn[13]='D';
        $this->cn[14]='E';
        $this->cn[15]='F';
        $this->cn[16]='G';
        $this->cn[17]='H';
        $this->cn[18]='I';
      &