Is the case of <?php important in any way?

Hi. I've recently come across some third party code which uses ... <?PHP as the PHP tag. This is the first time I've seen PHP in upper case for the tag. The code works in V5, so, from this, I can assume the tag is read case insensitive. Are there any issues with this when moving forward? When Unicode support is re-committed to trunk, does case sensitivity become part of this? Regards, Richard. -- ----- Richard Quadling "Standing on the shoulders of some very clever giants!" EE : http://www.experts-exchange.com/M_248814.html EE4Free : http://www.experts-exchange.com/becomeAnExpert.jsp Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731 ZOPA : http://uk.zopa.com/member/RQuadling