What best practices should be followed when including files in PHP to avoid conflicts with existing HTML elements?

When including files in PHP that contain HTML elements, it is important to avoid conflicts with existing HTML elements by ensuring that the included file does not contain any duplicate IDs or classes. To prevent conflicts, use unique IDs and classes in the included file or use more specific selectors to target elements. Additionally, consider using PHP's output buffering functions to capture the output of the included file and then insert it into the desired location within the HTML document. 

<?php
ob_start();
include 'file-to-include.php';
$content = ob_get_clean();
echo str_replace('existing-content-placeholder', $content, $html);
?>

Keywords

include require namespace PHP HTML

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