使用curl和get_meta_tags()获取元标记信息

Question

有没有办法使用curl这样你可以做一些与php中的get_meta_tags()函数相同的东西？特别是在php中使用curl以尽可能少的开销来获取外部站点的元标记

Answer 1

function file_get_contents_curl($url)
{
$ch = curl_init();

curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);

$data = curl_exec($ch);
curl_close($ch);

return $data;
}

$html = file_get_contents_curl("http://www.example.com");

//parsing begins here:
$doc = new DOMDocument();
@$doc->loadHTML($html);
$nodes = $doc->getElementsByTagName('title');

//get and display what you need:
$title = $nodes->item(0)->nodeValue;

$metas = $doc->getElementsByTagName('meta');

for ($i = 0; $i < $metas->length; $i++)
{
$meta = $metas->item($i);
if($meta->getAttribute('name') == 'description')
    $description = $meta->getAttribute('content');
if($meta->getAttribute('name') == 'keywords')
    $keywords = $meta->getAttribute('content');
if($meta->getAttribute('language') == 'language');
    $language = $meta->getAttribute('language');
}

echo "Title: $title". '<br/><br/>';
echo "Description: $description". '<br/><br/>';
echo "Keywords: $keywords";