使用CodeIgniter从mysql数据库生成XML表

Question

HTML（Codeigniter视图）中的这段代码有什么问题？它应该根据数据库销售发票信息生成一个VML文件。

<?php
    $this->load->helper('xml');
    $this->load->dbutil();
    $this->load->helper('file'); 
    $this->load->database();

    $report = $query = $this->db->get('invoices_salesvan_warehouse');
    $new_report = $this->dbutil->xml_from_result($report);
    write_file(‘xml_file.xml’,$new_report); 
?>

Answer 1

try with

  function getDataForXML(){

   return $query = $this->db->get('invoices_salesvan_warehouse');

}  

function getreport()
{
    $this->load->dbutil();
    $this->load->helper('file');
    $report = $this->getDataForXML();
    $new_report = $this->dbutil->xml_from_result($report);
    write_file('xmlfile.xml',$new_report);
}