yield implementation in codeigniter template engine

http://php.net/manual/en/language.genera...ures.yield

yield is a keyword in PHP 5.5+. It was used by some template libraries as a method/property prior to PHP 5.5, but most of those which are still maintained have been updated to remove the use of yield to avoid this conflict.

Bonfire

Practical CodeIgniter 3
CodeIgniter Testing Guide