How can the use of absolute paths in PHP improve code portability and flexibility?

Using absolute paths in PHP improves code portability and flexibility by ensuring that the file paths are consistent across different environments. This means that the code can be easily moved or deployed to different servers without having to worry about changing the file paths. Absolute paths also make the code more robust and less prone to errors related to relative path issues.

// Using absolute paths in PHP
$rootPath = $_SERVER['DOCUMENT_ROOT'];
include($rootPath . '/path/to/file.php');