PHP Normalize Newlines/Line Endings; CRLF; CR; LF; UNIX, Windows, Mac

LF:    Line Feed, U+000A

VT:    Vertical Tab, U+000B

FF:    Form Feed, U+000C

CR:    Carriage Return, U+000D

CR+LF: CR (U+000D) followed by LF (U+000A)

NEL: Next Line, U+0085

LS:    Line Separator, U+2028

PS:    Paragraph Separator, U+2029