994 B
994 B
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| Constants |
Constants
Constants are a type of variable in PHP. The define() function to set a constant takes three arguments - the key name, the key's value, and a Boolean (true or false) which determines whether the key's name is case-insensitive (false by default). A constant's value cannot be altered once it is set. It is used for values which rarely change (for example a database password OR api key).
Scope
It is important to know that unlike variables, constants ALWAYS have a global scope and can be accessed from any function in the script.
Example
<?php
define("freeCodeCamp", "Learn to code and help nonprofits", false);
echo freeCodeCamp;
Output:
Learn to code and help nonprofits