PHP编程：PHP实现生成唯一会员卡号

PHP学习
class Code { 
 //暗码字典 
 private $dic = array( 
 0=>'0', 1=>'1', 2=>'2', 3=>'3', 4=>'4', 5=>'5', 6=>'6', 7=>'7', 8=>'8', 
 9=>'9', 10=>'A', 11=>'B', 12=>'C', 13=>'D', 14=>'E', 15=>'F', 16=>'G', 17=>'H', 
 18=>'I',19=>'J', 20=>'K', 21=>'L', 22=>'M', 23=>'N', 24=>'O', 25=>'P', 26=>'Q', 
 27=>'R',28=>'S', 29=>'T', 30=>'U', 31=>'V', 32=>'W', 33=>'X', 34=>'Y', 35=>'Z' 
 ); 
 public function encodeID($int, $format=8) { 
 $dics = $this->dic; 
 $dnum = 36; //进制数 
 $arr = array (); 
 $loop = true; 
 while ($loop) { 
  $arr[] = $dics[bcmod($int, $dnum)]; 
  $int = bcdiv($int, $dnum, 0); 
  if ($int == '0') { 
  $loop = false; 
  } 
 } 
 if (count($arr) < $format) 
  $arr = array_pad($arr, $format, $dics[0]); 
 return implode('', array_reverse($arr)); 
 } 
 public function decodeID($ids) { 
 $dics = $this->dic; 
 $dnum = 36; //进制数 
 //键值交换 
 $dedic = array_flip($dics); 
 //去零 
 $id = ltrim($ids, $dics[0]); 
 //反转 
 $id = strrev($id); 
 $v = 0; 
 for ($i = 0, $j = strlen($id); $i < $j; $i++) { 
  $v = bcadd(bcmul($dedic[$id { 
  $i } 
  ], bcpow($dnum, $i, 0), 0), $v, 0); 
 } 
 return $v; 
 } 
}

PHP学习
$code = new Code(); 
$card_no = $code->encodeID(888888,5); 

PHP学习
$card_pre = '755'; 
$card_vc = substr(md5($card_pre.$card_no),0,2); 
$card_vc = strtoupper($card_vc); 
echo $card_pre.$card_no.$card_vc;