What are the best practices for ensuring HTML validation in PHP projects?

To ensure HTML validation in PHP projects, it is important to use proper HTML markup and adhere to coding standards. One way to achieve this is by using a PHP library like HTML Purifier, which helps sanitize and validate HTML input to prevent XSS attacks and ensure valid HTML output. 

// Example code using HTML Purifier to sanitize HTML input
require_once 'path/to/HTMLPurifier.auto.php';

$config = HTMLPurifier_Config::createDefault();
$purifier = new HTMLPurifier($config);

$dirty_html = "<p><script>alert('XSS attack');</script></p>";
$clean_html = $purifier->purify($dirty_html);

echo $clean_html;

Keywords

HTML validation PHP projects W3C validation HTML errors PHP libraries

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