How can developers ensure that the generated HTML output from PHP is valid and properly formatted?

To ensure that the generated HTML output from PHP is valid and properly formatted, developers can use PHP's built-in functions like `htmlspecialchars()` to escape special characters and prevent XSS attacks. They can also use proper indentation and line breaks in their PHP code to ensure the generated HTML is well-formatted. Additionally, developers can use tools like HTML validators to check the output for any errors. 

<?php
// Example code snippet to generate valid and properly formatted HTML output
$html = "<h1>Hello, World!</h1>";
echo htmlspecialchars($html);
?>

Keywords

HTML validation PHP output formatting DOMDocument tidy extension

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