As stated on php.net:
echo is not actually a function (it is a language construct), so you are not required to use parentheses with it. echo (unlike some other language constructs) does not behave like a function, so it cannot always be used in the context of a function
Most code editors like Brackets, Dreamweaver and PhpStorm do not use parentheses with echo. Would be great if Textastic would do the same.
Customer support service by UserEcho