How can the use of HTML5 standards and validation tools help improve the compatibility of PHP-generated web pages across different browsers?

Using HTML5 standards and validation tools can help ensure that the PHP-generated web pages are structured correctly and adhere to best practices. This can improve compatibility across different browsers by reducing the likelihood of rendering issues or errors due to invalid markup. By validating the HTML output of PHP scripts, developers can catch potential problems early on and make necessary adjustments to ensure a consistent experience for users.

<?php
ob_start(); // Start output buffering

// PHP code to generate HTML content

$html_output = ob_get_clean(); // Get the buffered output
echo $html_output; // Output the HTML content

// Validate the HTML output using an HTML5 validation tool
// Make necessary adjustments based on validation results
?>