How can PHP developers ensure that their websites are optimized for both human users and search engine crawlers?

PHP developers can ensure their websites are optimized for both human users and search engine crawlers by implementing proper on-page SEO techniques such as using relevant keywords, creating unique and descriptive meta tags, optimizing images, and ensuring fast loading times. Additionally, developers should focus on creating user-friendly and responsive designs to enhance the overall user experience.

<!DOCTYPE html>
<html>
<head>
    <title>Optimized Website</title>
    <meta name="description" content="This is a description of the website for search engines">
    <meta name="keywords" content="keyword1, keyword2, keyword3">
</head>
<body>
    <h1>Welcome to our optimized website!</h1>
    <img src="image.jpg" alt="Image description">
</body>
</html>