New Line on PHP CLI

Question

Use double quotes ".

echo "next line\n";

Additional you can use the system-dependent constant PHP_EOL

echo "this is my text" . PHP_EOL;

Use double quotes instead. ".

Escape sequences are only parsed when inside double quotes, not single quotes.

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

Better not to concatenate anything in PHP, because it may lead to unexpected results, instead use a comma:

echo 'Text with new line' , PHP_EOL;

This will be faster too by the way: not concatenating and avoiding parsed double quotes.