What are the best practices for embedding JavaScript within PHP for optimal performance?

To ensure optimal performance when embedding JavaScript within PHP, it is recommended to separate the JavaScript code into its own file and include it using the <script> tag in the HTML output. This helps in reducing the size of the PHP files and improves code readability. Additionally, using a content delivery network (CDN) to host the JavaScript files can also enhance performance by leveraging caching and faster loading times.

// Separate JavaScript code into its own file (example.js)
// Include the JavaScript file in HTML output using the <script> tag
echo '<script src="https://cdn.example.com/example.js"></script>';