<?php

//export.php

include 'vendor/autoload.php';
use PhpOffice\PhpSpreadsheet\IOFactory;

if(isset($_POST["file_content"]))
{
 $temporary_html_file = './tmp_html/' . time() . '.html';

 file_put_contents($temporary_html_file, $_POST["file_content"]);

 $reader = IOFactory::createReader('Html');

 $spreadsheet = $reader->load($temporary_html_file);

 $writer = IOFactory::createWriter($spreadsheet, 'Xlsx');

 $filename = time() . '.xlsx';

 $writer->save($filename);

 header('Content-Type: application/x-www-form-urlencoded');

 header('Content-Transfer-Encoding: Binary');

 header("Content-disposition: attachment; filename=\"".$filename."\"");

 readfile($filename);

 unlink($temporary_html_file);

 unlink($filename);

 exit;
}

?>