How can the W3C Validator be used to validate PHP output and identify errors in HTML code?

To validate PHP output and identify errors in HTML code, you can use the W3C Validator by passing the PHP output as a parameter to the validator. This will check the HTML code generated by the PHP script for any errors or warnings. By fixing any issues identified by the validator, you can ensure that your PHP output produces valid HTML code.

<?php
ob_start(); // Start output buffering
// Your PHP code here
$output = ob_get_clean(); // Get the output generated by PHP
$validator_url = 'https://validator.w3.org/nu/?doc=' . urlencode($output); // Construct the validator URL
header('Location: ' . $validator_url); // Redirect to the W3C Validator
exit;
?>