phpSpreadSheet库在上传到服务器时出错

Question

I am working on a project, in which XLS file needs to be uploaded to the server and extract its content. When I worked on my localhost it was working perfectly, but after I uploaded the project on the server, phpSpreadSheet library started not working. I checked the error_log file in the server and noticed that the following error has appeared.

PHP Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in 'vendor/markbaker/complex/classes/src/operations/add.php' 

I think that I do not have any error in my code as the library was working in my localhost without errors.

 $reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader('Xlsx');
 $reader->setReadDataOnly(TRUE);

 $spreadsheet = $reader->load(strip_tags($file_path));

 $worksheet = $spreadsheet->getActiveSheet();

        $highestRow = $worksheet->getHighestRow();
        $highestColumn = $worksheet->getHighestColumn();

        $data = $worksheet->rangeToArray(
            'A1:' . $highestColumn . '1',
            NULL,TRUE,TRUE
        );

Answer 1

After a long search, I solved the issue by upgrading the php version on the server. Php version on the server was 5.4 and it was causing the problem, phpSpreadSheet software requirement shows that supported PHP version is 5.6 or newer.