In what situations is it advisable to use include() or require() instead of iframes in PHP for embedding files?
When embedding files in PHP, it is advisable to use include() or require() instead of iframes when you want to include the content directly into the current page. This is because include() and require() are PHP functions that allow you to include and evaluate the specified file within the current script, while iframes load the content in a separate HTML document. Using include() or require() provides better integration of the included file with the rest of the page and allows for easier manipulation of the included content.
<?php
// Using include() to embed a file within the current PHP script
include('file_to_include.php');
?>