更改先前定义的常量的值

Change the value of a previously-defined constant(更改先前定义的常量的值)

问题描述

我在 PHP 中定义了一个常量，例如

I have defined a constant in PHP e.g.

define('CONSTANT_NAME', 'constant_value');

我希望稍后能够在代码中更改此常量的值.

I want to be able to change the value of this constant later on in the code.

这可以吗?如果有，怎么做?

Can this be done? If so, how?

推荐答案

来自 http:///php.net/manual/en/function.define.php(重点是我的):

From http://php.net/manual/en/function.define.php (emphasis is mine):

define — 定义一个命名的constant

来自 http://www.php.net/manual/en/language.constants.php:

顾名思义，该值在脚本执行期间无法更改

As the name suggests, that value cannot change during the execution of the script

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