What are the best practices for handling tag manipulation in PHP?

Tag manipulation in PHP involves manipulating HTML tags within a string. To handle tag manipulation effectively, it is recommended to use PHP's built-in functions like strip_tags() to remove unwanted tags, htmlspecialchars() to escape special characters within tags, and DOMDocument class for more advanced manipulation tasks.

// Example code snippet for handling tag manipulation in PHP
$html = '<p><strong>Hello</strong> World</p>';

// Remove all HTML tags except <p> and <strong>
$allowed_tags = '<p><strong>';
$clean_html = strip_tags($html, $allowed_tags);

// Escape special characters within the tags
$escaped_html = htmlspecialchars($clean_html);

echo $escaped_html;