1.打印苹果日志

@@ -45,8 +45,19 @@ class Order extends Model
      */
     static public function get_sn($prefix = '')
     {
-        $Sn = $prefix . strtoupper(dechex(date('m'))) . date('d') . substr(time(), -5) . substr(microtime(), 2, 5) . sprintf('%02d', rand(0, 99));
-        return $Sn;
+        $chars = md5(uniqid(mt_rand(), true));
+
+        $len = strlen($prefix);
+
+        if ($len > 5) $prefix = substr($prefix, 0, 5);
+
+        $uuid = $prefix . dechex(date('m')) . date('d') . substr(time(), -5 + $len) . '-'
+            . substr(microtime(), 2, 4) . '-'
+            . substr($chars, 12, 4) . '-'
+            . substr($chars, 16, 4) . '-'
+            . substr($chars, 20, 12);
+
+        return strtoupper($uuid);
     }
 
 }
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