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This article introduces the knowledge of "when to be case-insensitive in php". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

In PHP, there are: 1, function name; 2, method name; 3, class name; 4, NULL;5, TRUE;6, FALSE;7, keyword; 8, magic constant is not case-sensitive, but it is recommended to use uppercase.

Operating environment of this tutorial: windows10 system, PHP7.1 version, DELL G3 computer

What is case-insensitive in php

1. Variable names are case sensitive

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