How to set constants for php

This article mainly introduces "how to set constants in php". In daily operation, I believe many people have doubts about how to set constants in php. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to set constants in php". Next, please follow the editor to study!

1. Use the define () function with the syntax "define ('constant name', 'constant value')".

Legal constant names can only start with letters and underscores, followed by letters, numbers, or underscores of any length. In PHP, you can define a constant through the define () function.

2. Use the const keyword with the syntax "const constant name = constant value;".

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