What are some best practices for beginners to follow when working on mini projects in PHP?

Issue: Beginners often struggle with organizing their code and keeping it clean when working on mini projects in PHP. One best practice to follow is to break down the project into smaller, manageable tasks and create separate files for different functionalities. Code snippet:

// index.php
<?php
include 'header.php';
include 'sidebar.php';
include 'content.php';
include 'footer.php';
?>

// header.php
<!DOCTYPE html>
<html>
<head>
    <title>Mini Project</title>
</head>
<body>

// sidebar.php
<div class="sidebar">
    <ul>
        <li>Home</li>
        <li>About</li>
        <li>Contact</li>
    </ul>
</div>

// content.php
<div class="content">
    <h1>Welcome to the Mini Project</h1>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
</div>

// footer.php
</body>
</html>