What steps should be taken to ensure the correct installation and usage of the Spreadsheet Excel Writer in PHP?

To ensure the correct installation and usage of the Spreadsheet Excel Writer in PHP, you should make sure to include the necessary library files, set the correct permissions for writing Excel files, and follow the documentation for proper usage.

require_once 'Spreadsheet/Excel/Writer.php';

$workbook = new Spreadsheet_Excel_Writer();
$worksheet =& $workbook->addWorksheet('Sheet1');

$worksheet->write(0, 0, 'Hello');
$worksheet->write(0, 1, 'World');

$workbook->send('test.xls');
$workbook->close();