syntax - Is there a speed difference between <?php echo $var; ?> and <?=$var?>?

Question

Is there any speed difference between these two versions?

<?php echo $var; ?>

<?=$var?>

Which do you recommend, and why?

Answer 1

Performance difference is insignificant. Moreover, with use of APC, performance difference is zero, null, nada.

Short tags are problematic within XML, because <? is also markup for XML processing tag. So if you're writing code that should be portable, use the long form.

See short_open_tag description in http://www.php.net/manual/en/ini.core.php