через запятую
A comma-separated values (CSV) file is a delimited text file that uses a comma to separate values.https://en.wikipedia.org/wiki/Comma-separated_values
Further, PHP has separate, built-in implementations of all of them; for example, UUencoded data can be handled using convert_uuencode/convert_uudecode.https://github.com/php/php-src/blob/php-8.2.0RC5/U...