What is the issue with including a local file in PHP and why does including a file via HTTP not work as expected?

When including a local file in PHP using `include` or `require`, the file path should be specified correctly relative to the current file. If the file path is incorrect or the file does not exist, PHP will throw an error. Including a file via HTTP does not work as expected because PHP does not have the ability to include files directly from a remote server due to security reasons. 

// Correct way to include a local file in PHP
include 'path/to/file.php';

Keywords

local file inclusion HTTP include security vulnerability file path remote file inclusion

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