PHP回声vs PHP短标签 [英] PHP echo vs PHP short tags

问题描述

他们是否平等安全？我被告知，使用

 <？= $ function_here？> 
  

不太安全，并且会减慢页面加载时间。
我严格偏向于使用echo。

有什么优点/缺点？

解决方案

<？和<？= 被称为短开标签，并不总是启用（请参阅 short_open_tag <？= 始终可用）。

实际上，在PHP 5.3.0提供的php.ini-production文件中，默认情况下它们是禁用的：

  $ grep'short_open'php.ini-production 
; short_open_tag 
 short_open_tag =关闭
  

因此，在您要分发的应用程序中使用它们可能不会是一个好主意：如果您的应用程序未启用，您的应用程序将无法工作。

<？php ，on另一方面，不能被禁用 - 所以，使用这一个是最安全的，即使它写的时间更长。

除了事实上，短打开标签不一定启用，我不认为有很大的区别。

Are they equal in safeness? I was informed that using

<?=$function_here?>

was less safe, and that it slows down page load times. I am strictly biased to using echo.

What are the advantages/disadvantages?

解决方案

<? and <?= are called short open tags, and are not always enabled (see the short_open_tag directive) with PHP 5.3 or below (but since PHP 5.4.0, <?= is always available).

Actually, in the php.ini-production file provided with PHP 5.3.0, they are disabled by default:

$ grep 'short_open' php.ini-production
; short_open_tag
short_open_tag = Off

So, using them in an application you want to distribute might not be a good idea: your application will not work if they are not enabled.

<?php, on the other side, cannot be disabled -- so, it's safest to use this one, even if it is longer to write.

Except the fact that short open tags are not necessarily enabled, I don't think there is much of a difference.

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