What are some common pitfalls when including files in PHP and how can they affect the structure of links?

Common pitfalls when including files in PHP include using relative paths that may break when files are moved or renamed, not properly handling file permissions or file existence checks, and not considering the impact on link structure when including files from different directories. To avoid these issues, it's recommended to use absolute paths or define a base directory constant for file includes. 

<?php
// Define base directory constant
define('BASE_DIR', __DIR__);

// Include file using absolute path
include BASE_DIR . '/path/to/file.php';
?>

Keywords

include require include_once require_once broken links

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