What are \r and \n meaning in PHP?

Question

what are these called \\r \\n and is there a tutorial that explains them?

Answer 1

\r is a Carriage Return \n is a Line Feed (or new line).

On Windows systems these together make a newline (i.e. every time you press the enter button your fix will get a \r\n).

In PHP if you open a Windows style text file you will get \r\n at the end of paragraphs / lines were you've hit enter. If it was a Unix style text file you'd only get a \n.