What if the global variable global fails after multiple include of php

This article will explain in detail how to invalidate the global variable global after many times of include in php. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

The specific analysis is as follows:

In multiple files, one file after another include, but the functions in the last file cannot reference global variables after using global. For example:

A.php file:

B.php file:

Display: null

This failure is caused by a variety of reasons. One effective way is that if you decide to treat a variable as a global variable for multiple files, then using the $GLOBALS array is always valid. For example, a.php in the example above:

You can then reference this variable in functions and methods in multiple files.

This is the end of the article on "how to invalidate the global variable global after php include many times". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it out for more people to see.