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

Not an answer to your question, but relevant nonetheless: I'd recommend using the PHP_EOL constant whenever you want to insert a new line. The PHP_EOL constant contains the correct new line character(s) for the platform on which the script is being run (\n on Unix, \r\n on Windows).