Making a new line with single quotes?

Question

Can I do a line break like this \'\\n\'?

Or do I must use double quotes - \"\\n\"?

Answer 1

To output a newline (or any other control character for that matter) you must always use double quotes.

An alternative to not use double quotes is chr() with the respective ASCII code as an argument:

echo chr(10); // same as echo "\n";