问题
can anybody please explain what are these special tags in php?
<?= ?>
I couldn't find it on google.
回答1:
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.
回答2:
It's part of the short_open_tag. Basically <?=$foo?> is equivalent to <?php echo $foo; ?>
回答3:
They output what's inside them directly.
<?= "something" ?>
is a shortcut for:
<?php echo "something"; ?>
These (together with <? ?>) are called short tags. See here (short_open_tag)
回答4:
<?= $foobar ?> is a shortcut for <?php echo $foobar; ?>.
I wouldn't recommend using these short tags because in some webserver environments they are disabled via PHPs configuration.
回答5:
yes you can done it using .htaccess. In your .htaccess file, add this
php_value short_open_tag 1
Now you can check files with <?='hi';?> instead of <?php ?>
来源：https://stackoverflow.com/questions/2662476/special-tags-in-php