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PHP Constants

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In this lesson, I'm going to show you the importance and to how to use the Constants. In PHP, a Constant is an identifier (name) fro a simple value. As the value cannot be changed, unlike to variable.
A Constant name must start with a letter or underscore and no dollar sign before the constant name. And unlike variables, constants are automatically global across the entire script.

How to set Constants
In setting a constant, we’re going to use the define() function, and it takes a three parameters: First the parameter is used to define the name of the constant, and the second parameter is

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