What is the significance of using $_SERVER['DOCUMENT_ROOT'] in PHP functions?

Using $_SERVER['DOCUMENT_ROOT'] in PHP functions is significant because it provides the absolute path to the root directory of the server where the current script is executing. This is useful when you need to include files or resources in your PHP script without worrying about the file path changing when the script is moved to a different directory or server. 

// Get the absolute path to the root directory of the server
$rootPath = $_SERVER['DOCUMENT_ROOT'];

// Include a file using the absolute path
include($rootPath . '/path/to/file.php');

Keywords

$_SERVER['DOCUMENT_ROOT'] PHP functions significance file paths server variables

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