PHP は固有の会員カード番号を生成します

class Code {     //密码字典     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;     }  } 

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

$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;