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:
https://github.com/techweber/php
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