What best practices should be followed when creating PHP navigation systems for multiple pages?

When creating PHP navigation systems for multiple pages, it is important to use a modular approach to ensure scalability and maintainability. One best practice is to create a separate PHP file for the navigation menu that can be included on all pages using PHP's include function. This allows for easy updates to the navigation menu without having to edit each individual page. 

// navigation.php

<nav>
    <ul>
        <li><a href="index.php">Home</a></li>
        <li><a href="about.php">About</a></li>
        <li><a href="services.php">Services</a></li>
        <li><a href="contact.php">Contact</a></li>
    </ul>
</nav>
```

To include the navigation menu on a page, simply use the include function like so:

```php
<?php include 'navigation.php'; ?>

Keywords

PHP navigation systems multiple pages routing URL parameters

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