How can the use of PHP constants impact code readability and maintenance?

Using PHP constants can improve code readability and maintenance by providing a clear and consistent way to define and reference values that are used throughout the codebase. By using constants, you can easily update a value in one place without having to search for and update every instance of that value in the code. This can help prevent errors and make the code easier to understand for other developers. 

define('DB_HOST', 'localhost');
define('DB_USER', 'username');
define('DB_PASS', 'password');
define('DB_NAME', 'database');

$connection = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);

Keywords

PHP constants code readability maintenance impact programming practices

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