has a short_open_tag value in the php configuration file (php.ini). After it is turned on, you can use PHP segment tags: ( ?>).
Also, only when this is turned on can you use = instead of echo . This method is used in CodeIgniter's video tutorial.
However, this short tag is not recommended. Using is the standard method. It is only because this short tag has been used for a long time that this feature has been preserved.