How can outdated HTML4 code be updated to meet modern standards and best practices in PHP web development?

Outdated HTML4 code can be updated to meet modern standards and best practices by converting it to HTML5, which includes semantic elements and improved accessibility features. Additionally, PHP can be used to dynamically generate HTML content, separate presentation from logic using templates, and sanitize input to prevent security vulnerabilities. 

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Updated PHP Web Development</title>
</head>
<body>
<?php
  // PHP code to dynamically generate content
  $name = "John";
  echo "<h1>Hello, $name!</h1>";
?>
</body>
</html>

Keywords

HTML4 modern standards PHP web development update best practices

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