To Convert HTML file to Excel File:

$inputFileType = 'HTML';
$inputFileName = './HtmlFile.html';
$outputFileName = './ExcelFile.xlsx';
$outputFileType = 'Excel2007';


$objPHPExcelReader = PHPExcel_IOFactory::createReader($inputFileType);
$objPHPExcel = $objPHPExcelReader->load($inputFileName);

$objPHPExcelWriter = PHPExcel_IOFactory::createWriter($objPHPExcel,$outputFileType);
$objPHPExcel = $objPHPExcelWriter->save($outputFileName);