// Setting the value of a cell $objPHPExcel->getActiveSheet() ->setCellValue('A1', 'Hello World!');
// Getting the value of a cell $value = $objPHPExcel->getActiveSheet() ->getCell('A1') ->getValue();In this example, the `getValue()` method is used to retrieve the value of cell A1. PHPExcel is a package library for PHP that allows developers to read, write and manipulate Excel spreadsheets in PHP. It offers a wide variety of features and functionality to create complex Excel files.