Reliably Remove Newlines From String

Question

The string input comes from textarea where users are supposed to enter every single item on a new line.

When processing the form, it is easy to explode the textarea

Answer 1

'\r' by itself as a line terminator is an old convention that's not really used anymore (not since OSX which is Unix based).

Your explode will be fine. Just trim off the '\r' in each resulting element for the Windows users.