How can duplicate code be avoided in PHP scripts, such as including the same file multiple times?

Duplicate code can be avoided in PHP scripts by using the include_once() or require_once() functions to include files. These functions ensure that a file is only included once, preventing duplicate code execution. By using these functions, you can organize your code into separate files and include them when needed without worrying about duplication. 

<?php
// Include the file only once
include_once('common.php');
?>

Keywords

PHP code duplication include_once require_once namespaces

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