What does <?= mean?

2018-05-29 14:13:28

whats the meaning of this line

<input type=text name="name" value="<?= $name ?>

if we are to declare as PHP shouldn't we write <?php instead of <?=

Thanks

<?= are PHP short open tags, which can be enabled (or disabled) via the short_open_tag directive in php.ini (quoting) :

This directive also affects the shorthand <?= , which is identical to <? echo <? echo . Use of this shortcut requires short_open_tag to be on .

And:

Also if disabled, you must use the long form of the PHP open tag ( <?php ?> ).

This means your portion of code :

<input type=text name="name" value="<?= $name ?>

Is equivalent to this one :

<input type=text name="name" value="<?php echo $name; ?>

But only when short open tags are enabled .

And, as a sidenote : short open tags are not always enabled -- in fact, they are disabled by default, with recent versions of PHP.

Which means it might be wise to not depend on those, at least if you want to deploy your application on servers on which you are not administrator.

<?= ... ?>是<?php echo ... ?>简写

using short tags is generally frowned upon nowadays but it's still an option in the php.ini. It's fine, it's just poor coding style and has some repercussions if you use multiple dynamic languages.

链接地址: http://www.djcxy.com/p/1852.html

上一篇: 是什么意思 []

下一篇: <？=是什么意思？