zend framework / view <?= does not work ? why ?

Answer 1

Check your php.ini, you probably have short tags disabled. See the manual page

Answer 2

Looks like your server configuration has short_open_tag turned off. This is generally a good thing, short_open_tag saves you some characters but can cause problems while parsing some types of documents.

I'd leave it off unless you know for sure that you will need it.