src/Gateways/Wechat/BillGateway.php
public function apply(array $options)
    {
        unset($this->config['trade_type']);
        unset($this->config['notify_url']);
        $this->config = array_merge($this->config, $options);
        $this->config['sign'] = $this->getSign($this->config);
        return $this->post($this->gateway_bill, $this->toXml($this->config));
    }
public function apply(array $options)
    {
        unset($this->config['trade_type']);
        unset($this->config['notify_url']);
        $this->config = array_merge($this->config, $options);
        $this->config['sign'] = $this->getSign($this->config);
        return $this->post($this->gateway_bill, $this->toXml($this->config));
    }
应用并返回参数
@param array $options
@return bool|string