src/ClientBase.php
protected function baseUrl(array $config = [])
    {
        if (isset($this->baseUrl)) {
            return $this->baseUrl;
        }

        if (isset($config['base_url'])) {
            $this->baseUrl = $config['base_url'];
            return $this->baseUrl;
        }

        switch ($config['env']) {
            case self::ENV_DEVELOPMENT:
                $this->baseUrl = self::BASE_URL_DEVELOPMENT;
                break;

            case self::ENV_PRODUCTION:
                $this->baseUrl = self::BASE_URL_PRODUCTION;
                break;

            default:
                $message = sprintf(
                    'Unsupported environment "%s". Supported environments are "%s"',
                    $config['env'],
                    implode(', ', [self::ENV_DEVELOPMENT, self::ENV_PRODUCTION])
                );
                throw new \InvalidArgumentException($message);
        }

        return $this->baseUrl;
    }
protected function baseUrl(array $config = [])
    {
        if (isset($this->baseUrl)) {
            return $this->baseUrl;
        }

        if (isset($config['base_url'])) {
            $this->baseUrl = $config['base_url'];
            return $this->baseUrl;
        }

        switch ($config['env']) {
            case self::ENV_DEVELOPMENT:
                $this->baseUrl = self::BASE_URL_DEVELOPMENT;
                break;

            case self::ENV_PRODUCTION:
                $this->baseUrl = self::BASE_URL_PRODUCTION;
                break;

            default:
                $message = sprintf(
                    'Unsupported environment "%s". Supported environments are "%s"',
                    $config['env'],
                    implode(', ', [self::ENV_DEVELOPMENT, self::ENV_PRODUCTION])
                );
                throw new \InvalidArgumentException($message);
        }

        return $this->baseUrl;
    }
protected function baseUrl ( array $ config = [ ] ) { if ( isset ( $ this -> baseUrl ) ) { return $ this -> baseUrl ; } if ( isset ( $ config [ 'base_url' ] ) ) { $ this -> baseUrl = $ config [ 'base_url' ] ; return $ this -> baseUrl ; } switch ( $ config [ 'env' ] ) { case self :: ENV_DEVELOPMENT : $ this -> baseUrl = self :: BASE_URL_DEVELOPMENT ; break ; case self :: ENV_PRODUCTION : $ this -> baseUrl = self :: BASE_URL_PRODUCTION ; break ; default : $ message = sprintf ( 'Unsupported environment "%s". Supported environments are "%s"' , $ config [ 'env' ] , implode ( ', ' , [ self :: ENV_DEVELOPMENT , self :: ENV_PRODUCTION ] ) ) ; throw new \ InvalidArgumentException ( $ message ) ; } return $ this -> baseUrl ; }
Return the base url for the Canada Post API.

@param array $config

@return mixed|string
The base url.
@throws \InvalidArgumentException
Return the base url for the Canada Post API .