What are potential performance issues when including multiple PHP files in a generated webpage?

Including multiple PHP files in a generated webpage can lead to performance issues due to the additional overhead of reading and parsing each file. To solve this issue, you can use PHP's `include_once` or `require_once` functions to include the files only once, preventing duplicate inclusion and reducing the performance impact. 

<?php
require_once 'header.php';
require_once 'content.php';
require_once 'footer.php';
?>

Keywords

include PHP files performance webpage generated

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