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

No - \n in single quotes is '\n'.
Yes - you have to use double quotes.

Answer 2

just add

.PHP_EOL;

to the end of your line using single quotes and you will have a new line

Answer 3

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";

Answer 4

You have to use double quotes. Otherwise, PHP will literally output \n.

http://php.net/manual/en/language.types.string.php