How can defining constants in a separate file impact variable output in PHP scripts?

Defining constants in a separate file can impact variable output in PHP scripts by providing a centralized location for storing constant values that can be easily accessed and reused throughout the application. This can help improve code readability, maintainability, and consistency by avoiding hardcoding values directly in the script. To implement this, you can create a separate PHP file specifically for defining constants using the define() function, and then include this file in your main PHP script using the require_once() or include_once() function. 

// constants.php
define('SITE_NAME', 'My Website');
define('DB_HOST', 'localhost');
define('DB_USER', 'root');
define('DB_PASS', 'password');

// main.php
require_once('constants.php');

echo SITE_NAME; // Output: My Website
echo DB_HOST; // Output: localhost

Keywords

constants separate file variable output PHP scripts impact

Related Questions