我如何使用PHP获得与Facebook相同的墙贴

maybe it not the correct question but i'm looking for help, i have use curl, DOMDocument, and file_get_contents to get a image tag as facebook do but i can't. enter image description here

some thing like this.

Facebook uses specific Open Graph meta tags that publishers can use to suggest an image, title, and description for Facebook to use when sharing a URL. You will want to load the HTML with DOMDocument, and then look for these tags.

Look for tags with og: in the name, like this:

<meta property="og:image" content="http://example.com/image.png" />

See also: http://davidwalsh.name/facebook-meta-tags

My code look like this: i'm trying to get image image from yahoo link just like test https://es.finance.yahoo.com/noticias/amazon-prev-vender-un-smartphone-200856947.html

header('Content-Type: application/json');
if(isset($_GET['c_txt'])){
$url = $_GET['c_txt'];
if(curl_init($url)){
    $html = file_get_contents($url);

    $doc = new DOMDocument();
    @$doc->loadHTML($html);

    $tags = $doc->getElementsByTagName('img');

    foreach ($tags as $tag) {
           echo $tag->getAttribute('src') . "
";
    }
  }
}

but the result looks like:

https://sb.scorecardresearch.com/b?  c1=2&c2=7241469&c7=es.finance.yahoo.com%2Fnoticias%2Famazon-prev-vender-un-smartphone-200856947.html&c5=1185584786&c15=$&cv=2.0&cj=1
https://s.yimg.com/dh/ap/default/130307/expansion_header_article.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/dh/ap/default/130711/masnoticiasen2.jpg
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png
https://s.yimg.com/os/mit/media/m/base/images/transparent-1093278.png

and not the image that display at facebook, the tag what i want is this one: enter image description here