googleadservices.com capture and redirect to bypass ads tracking

index.php

<?php
// Use the Redirector Chrome plugin to redirect to your local site.
// Catch AD URLs like https://www.googleadservices.com/pagead/aclk?sa=L&ai=CPeysfenknZ5HpCCI2yiM0PtbaegA...
// Check if 'adurl' parameter exists in the URL query string
if (isset($_GET['adurl'])) {
    $adUrl = $_GET['adurl'];

    // Basic validation to ensure it's a HTTP/HTTPS URL
    if (preg_match('/^(http|https):\/\//', $adUrl)) {
        // Redirect browser to the extracted ad URL
        header('Location: ' . $adUrl);
        exit;
    } else {
        // Fallback: Google Search for invalid adurl
        http_response_code(302); // Found (for redirects)
        $lastParam = basename(parse_url($adUrl, PHP_URL_PATH));
        $searchQuery = urlencode($lastParam);
        header('Location: https://www.google.com/search?q=' . $searchQuery);
        exit;
    }
} else {
    // No 'adurl' parameter: Google Search for last URL parameter
    http_response_code(302); // Found (for redirects)
    $queryParams = array_slice($_GET, -1); // Get the last query parameter
    $lastKey = key($queryParams);
    $searchQuery = urlencode($lastKey . ':' . $queryParams[$lastKey]);
    header('Location: https://www.google.com/search?q=' . $searchQuery);
    exit;
}