出错啦

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错误信息
• 错误文件 ：../../../private/helper/link.php
• 错误代码 ：0
• 错误描述 ：Invalid param key
• 错误行 ：112 on

  102:	        $realID = base_convert($id, $this->destHex, $this->sourceHex);
  103:	
  104:	        return $realID - $this->baseId;
  105:	    }
  106:	    /**
  107:	     * 验证生成的字符串是否正确
  108:	     */
  109:	    public function validKey($key)
  110:	    {
  111:	        if(!$key) {
  112:	            throw new \Exception('Invalid param key');
  113:	        }
  114:	        $sign = substr($key, -1 * $this->signLength);
  115:	
  116:	        $id = $this->getId($key) + $this->baseId;
  117:	
  118:	        if(substr(md5($this->privateKey . $id), 10, $this->signLength) == $sign) {
  119:	            return true;
  120:	        }
  121:	        return false;
  122:	    }

• 错误追踪如下：
    #0 /vhosts/hosts/travelzs/private/shortURL/index.php(29): helper\link->validKey('')
    #1 [internal function]: shortURL\index->indexAction()
    #2 /vhosts/hosts/Qii/src/Base/Dispatcher.php(161): call_user_func_array(Array, Array)
    #3 /vhosts/hosts/Qii/src/Application.php(558): Qii\Base\Dispatcher->dispatch()
    #4 /vhosts/hosts/travelzs/public/index.php(27): Qii\Application->run()
    #5 {main}

• Source URL:http://trzol.com/
• Referer URL:http://trzol.com/