未知标记 html问题,显示错误：未知的HTML标记_phpstorm_开发99编程知识库

所以我剛開始使用 PhpStorm，我嘗試'正確'代碼，所以沒有來自IDE的錯誤。 我有以下方法 below，所有的xml標記都突出顯示為的'未知的HTML標記'

什麼是最好的糾正方法？private function generate_qbxml_CustomerAddRq($requestID=0){

/** requestID is used when multiple requests are called in order to match the request to the response.

requestID's should be incremented as they are called. Currently not implimented. **/

$qbxml = '';

$qbxml. = '<?xml version="1.0" encoding="utf-8"?>';

$qbxml. = '<?qbxml version="2.0"?>';

$qbxml. = '';

$qbxml. = '';

$qbxml. = '';

$qbxml. = '';

$qbxml. = ''.$this->Name.'';//Name is a mandatory field. Add a check for this.

/** For all optional values add a check so that xml tags are not sent in request if value is blank**/

$qbxml. = ''.$this->CompanyName.'';

$qbxml. = ''.$this->FirstName.'';

$qbxml. = ''.$this->LastName.'';

$qbxml. = '';

$qbxml. = ''.$this->BillAddress->get_Addr1().'';

$qbxml. = ''.$this->BillAddress->get_Addr2().'';

$qbxml. = ''.$this->BillAddress->get_City().'';

$qbxml. = ''.$this->BillAddress->get_State().'';

$qbxml. = ''.$this->BillAddress->get_PostalCode().'';

$qbxml. = ''.$this->BillAddress->get_Country().' ';

$qbxml. = '';

$qbxml. = '';

$qbxml. = ''.$this->ShipAddress->get_Addr1().'';

$qbxml. = ''.$this->ShipAddress->get_Addr2().'';

$qbxml. = ''.$this->ShipAddress->get_City().'';

$qbxml. = ''.$this->ShipAddress->get_State().'';

$qbxml. = ''.$this->ShipAddress->get_PostalCode().'';

$qbxml. = ''.$this->ShipAddress->get_Country().' ';

$qbxml. = '';

$qbxml. = ''.$this->Phone.'';

$qbxml. = ''.$this->AltPhone.' ';

$qbxml. = ''.$this->Fax.' ';

$qbxml. = ''.$this->Email.' ';

//$qbxml. = 'Ob2';

$qbxml. = '';

$qbxml. = '';

$qbxml. = '';

$qbxml. = '';

return $qbxml;

}