PHP echo与PHP short echo标签 [英] PHP echo vs PHP short echo tags

问题描述

它们的安全性是否相等?我被告知使用

Are they equal in safeness? I was informed that using

<?=$function_here?>

不太安全，并且减慢了页面加载时间. 我严格偏向使用echo.

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

优点/缺点是什么?

推荐答案

<?和<?=被称为短打开标记，并且并不总是启用的(请参见

<? 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).

实际上，在PHP 5.3.0随附的php.ini-production文件中，默认情况下将其禁用:

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

因此，在要分发的应用程序中使用它们可能不是一个好主意:如果未启用它们，则您的应用程序将无法工作.

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 －因此，即使写入时间更长，使用它也是最安全的.

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

除了不一定要启用短开放标签之外，我认为没有太大区别.

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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