Question

Can you tell me with steps how can I do a like button in my site (php) to like a page photo on facebook?

I know that I have to use the GRAPH API and have to do the POST via HTTP to /likes .. but I dont know how can I do it with PHP code.

Somebody have an example?

Thank you

Answer 1

Fabio here is the php post snippet that i was able to get working. Snippet includes a curl to get application access token and the api post to like an object, in this case a post on my app.

• The Sample post is here: Shows the post to be liked

https://shawnsspace.com/plugins/TimeLinePost.php?pageid=135669679827333&postid=135669679827333_151602784936066&type=feed&fh=750

• The Like Page is here: Should Return whether the user likes or not, or login if not connected.
  https://shawnsspace.com/plugins/TheLike.php?postid=135669679827333_151602784936066

Getting the Application Access Token.

function GetCH(){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://graph.facebook.com/oauth/access_token?client_id=YOUR_APP_ID&client_secret=YOUR_APP_SECRET&grant_type=client_credentials");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT_MS,20000);
if(substr($url,0,8)=='https://'){
    // The following ensures SSL always works. A little detail:
    // SSL does two things at once:
    //  1. it encrypts communication
    //  2. it ensures the target party is who it claims to be.
    // In short, if the following code is allowed, CURL won't check if the 
    // certificate is known and valid, however, it still encrypts communication.
    curl_setopt($ch,CURLOPT_HTTPAUTH,CURLAUTH_ANY);
    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
}
$sendCH = curl_exec($ch);
curl_close($ch);
return $sendCH;
};
$app_access_token = GetCH();   

Looking in url for postid parameter then liking id

  if($_GET['postid']){
  $postid = $_GET['postid'];
  }else{
  $postid = '135669679827333_151602784936066';
  }

    if($user){
 $pageLike = $facebook->api('/'.$postid.'/likes?access_token='.$access_token.'&method=post', 'POST');
}