Check if URL is indexed by Google

indexed.php

<?php

function indexed($url) {
    $url = 'http://webcache.googleusercontent.com/search?q=cache:' . urlencode($url);
    
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Chrome 10');
    
    if (!curl_exec($ch)) {
        // var_dump('failed');
        return false;
    }
    
    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    // var_dump($code);

    return $code == '200';
}