PHP'de CURL ile Veri Çekerken Hata Veriyor

 $url = "https://www.google.com/search?q=istanbul+ankara+arasi+kac+km&rlz=1C1CHBD_trTR890TR890&oq=istanbul+an&aqs=chrome.0.69i59l3j69i57j0j69i60l3.2306j0j7&sourceid=chrome&ie=UTF-8";
$source = file_get_contents($url);

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$source = curl_exec($ch);
curl_close($ch);

libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML($source);
$xpath = new DOMXpath($doc);

$mesafe = $xpath->query('//*[@id="exp0"]/div[1]/div/div/span[1]/span[2]');

$info = $xpath->query('span',$mesafe);
echo "Mesafe : ". $info->item(0)->textContent;