How to change the value of a variable in PHPExcel, not a specific cell?

Question

PHP

For example, in Word, you can create a test.docx document with the following content:

Имя: ${name}
Фамилия: ${second_name}
Отчество: ${third_name}

And then on the server, using PHPWord, insert the necessary variables instead of these placeholders:

$phpWord = new PHPWord();
$template = $phpWord->loadTemplate("test.docx");
$template->setValue("name", "Ivan");
$template->setValue("second_name", "Ivanov");
$template->setValue("third_name", "Ivanovich");
$template->saveAs("newtest.docx");

How to do the same in excel? To manually insert the necessary variables (placeholders) into the document and then change them on the server? Is it possible?
Thanks in advance