使用PHP从Facebook页面获取标题和元标记

Question

How can I get the title and all the meta tags from a Facebook page?

I have this code:

function getMetaData($url){
   // get meta tags
   $meta=get_meta_tags($url);
   // store page
   $page=file_get_contents($url);
   // find where the title CONTENT begins
   $titleStart=strpos($page,'<title>')+7;
   // find how long the title is
   $titleLength=strpos($page,'</title>')-$titleStart;
   // extract title from $page
   $meta['title']=substr($page,$titleStart,$titleLength);
   // return array of data
   return $meta;
}
$tags=getMetaData('https://www.facebook.com/showmeapp?filter=3');
echo 'Title: '.$tags['title'];
echo '<br />';
echo 'Description: '.$tags['description'];
echo '<br />';
echo 'Keywords: '.$tags['keywords']

Example: https://www.facebook.com/showmeapp?filter=3

Answer 1

You really don´t need to deal with the Metatags, just call the Graph API:

$data = file_get_contents('https://graph.facebook.com/bladauhu'); //example page

Works even without an App, for every public page.

Answer 2

我认为网址不正确，请将您的网址更改为https://graph.facebook.com/showmeapp

Answer 3

Use Simple HTML DOM Parser

http://simplehtmldom.sourceforge.net/

Try below code:

  <?php 
  require_once('simple_html_dom.php');

  $page=$html = file_get_html('https://www.facebook.com/showmeapp');

  $title= $html->find('meta[name="title"]',0)->content;
  echo 'Title: '.$title ;
  echo '<br />';

  $description= $html->find('meta[name="description"]',0)->content;

  echo 'Description: '.$description;
  echo '<br />';

  $keywords= $html->find('meta[name="keywords"]',0)->content;
  echo 'Keywords: '.$keywords;
  ?>