can anybody please explain what are these special tags in php?
<?= ?>
I couldn't find it on google.
See the short_open_tags setting.
<?=
is identical to <? echo
and use of it requires short_open_tag
to be on. A term to search for would be "short tags".
As an example: <?='hello'?>
is identical to <? echo 'hello' ?>
which is a short form of <?php echo 'hello' ?>
.
See also Are PHP short tags acceptable to use? here on SO.