What are the potential pitfalls of including modular HTML headers in PHP scripts?

Including modular HTML headers in PHP scripts can lead to code duplication and maintenance issues. If the header content needs to be updated or modified, it would require changes in multiple PHP files. To solve this issue, it's recommended to create a separate PHP file for the header content and include it in all the necessary PHP scripts using the `include` or `require` function. 

// header.php
<!DOCTYPE html>
<html>
<head>
    <title>Page Title</title>
    <link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>

// index.php
<?php
include 'header.php';
?>
<h1>Welcome to my website!</h1>
<p>This is the content of the page.</p>

// other_page.php
<?php
include 'header.php';
?>
<h1>Another page</h1>
<p>Content of another page.</p>

Keywords

modular HTML headers PHP scripts include function code duplication header injection

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