更改先前定义的常数的值 [英] Change the value of a previously-defined constant

问题描述

例如，我已经在PHP中定义了一个常量.

I have defined a constant in PHP e.g.

define('CONSTANT_NAME', 'constant_value');

我希望以后可以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.

可以做到吗?如果可以，怎么办?

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):

define-定义一个命名的常数

define — Defines a named 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

这篇关于更改先前定义的常数的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！