Kirby 2 Page Error 500

[texnixe]

No, but it depends on your server settings and using these short tags is not recommended at all, as you can well see by running into this issue.

Using the short echo tag <?= , however, is.

To PHP Short Tag or not to PHP Short Tag?

In PHP 5.4 the echo “short tag” (<?=) is permanently enabled regardless of short_open_tag settings now. So it would be save to use <?= since Kirby has dropped PHP 5.3 support in 2.2. As regards the opening short tag <?, I guess that is enabled in most hosting environments. For the widest compatibility of your code, avoiding the open short tag is still your best bet. There’s also supposed to be a possible conflict issue with XML.