Are there any specific PHP libraries or tools recommended for converting HTML tables to xlsx format?

To convert HTML tables to xlsx format in PHP, one recommended library is PHPExcel. This library allows you to easily create Excel files from PHP code, including converting HTML tables. By using PHPExcel, you can read the HTML table data and write it to an xlsx file format.

<?php
require 'PHPExcel/Classes/PHPExcel.php';

// Create new PHPExcel object
$objPHPExcel = new PHPExcel();

// Add data from HTML table to PHPExcel object
$htmlTable = '<table><tr><th>Header 1</th><th>Header 2</th></tr><tr><td>Data 1</td><td>Data 2</td></tr></table>';
$objPHPExcel->getActiveSheet()->fromArray(
    array(
        array('Header 1', 'Header 2'),
        array('Data 1', 'Data 2')
    )
);

// Save PHPExcel object to xlsx file
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter->save('output.xlsx');
?>