How to use constants in PHP

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In this video training, you'll learn how to use constants in PHP. A constant is an identifier (name) for a simple value. The value cannot be changed during the script.
A valid constant name starts with a letter or underscore (no $ sign before the constant name).
Note: Unlike variables, constants are automatically global across the entire script.

You can download code of this video from my github repository:

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hi sir,
u help me?
i created define into a different file.
and when i call it into class, i get error message like this 'Uncaught Error: Undefined constant'
currently i'm using php v 8.1

EkoAgustiawan

Pahd ne ka nahi he sir samjane ka he....

talha

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