将值发送/发送到Excel文件中的单元格并从特定单元格中提取结果？

I have a Excel file stored on my webserver which i use as a calculator. I was wondering if it's any way possible to post/send values to specific cells and then extract the result from a specific cell? I would prefer to do this by PHP.

Use phpExcel, here's an example to open and modify your existing file:

<?php
error_reporting(E_ALL);
set_time_limit(0);

date_default_timezone_set('Europe/Lisbon');
set_include_path(get_include_path() . PATH_SEPARATOR . './Classes/');

include 'PHPExcel/IOFactory.php';

$fileType = 'Excel5'; //you may have to change this value
$fileName = 'yourfile.xlsm';

// Read the file
$objReader = PHPExcel_IOFactory::createReader($fileType);
$objPHPExcel = $objReader->load($fileName);

// Change the file
$objPHPExcel->setActiveSheetIndex(0)
            ->setCellValue('A1', 'Hello')
            ->setCellValue('B1', 'World!');

// Write the file
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, $fileType);
$objWriter->save($fileName);

Please refer to the official documentation and list of examples.