When do I use the PHP constant “PHP_EOL”?

Question

When is it a good idea to use PHP_EOL?

I sometimes see this in code samples of PHP. Does this handle DOS/Mac/Unix endline issues?

Answer 1

I am using WebCalendar and found that Mac iCal barfs on importing a generated ics file because the end-of-line is hardcoded in xcal.php as "\r\n". I went in and replaced all occurrences with PHP_EOL and now iCal is happy! I also tested it on Vista and Outlook was able to import the file as well, even though the end of line character is "\n".