adding like comment issue using graph api

Question

i have put last 3 posts in web page , if user loged in he can add comment / like , problem is if user loged in and try add like or comment he is getting an permission error #200

Answer 1

Double check and make sure your variable comm_id is formated with both the user id of the person who posted the post, and then the id of the post itself, with an underscore in between, like this - USERID_POSTID. This is how facebook gives it you if you call to the graph api

$post_url = "https://graph.facebook.com/" . $user_id . "/posts?access_token=". urlencode($access_token);

Not sure if you're getting comm_id from another source or not. Also noticed in your code

access_token : "<?php echo $access_token ?>"

You forgot a semi-colon after the echo call. Should be this

  access_token : "<?php echo $access_token; ?>"

Hope this helps. I see you're using a lot of jquery to do the like functionality. I like to stick w/ server side code for stuff like this, I feel that it's more stable for some reason.

This is how I did it. I have a like button like this -

echo '<div id="like_container-'.$i.'">
<div id="like_count">'.$num_likes.'</div>'
<a href="javascript:void()" onclick="fb_Like(\''.$post_id.'\',\''.$access_token.'\','.$num_likes.','.$i.')"><div class="unliked"></div></a>
</div>';

and fb_Like() is an ajax call, something like this -

function fb_Like(post_id, token, num_likes, id){
$.ajax({
type: "GET",
url: "likepost.php",
data: 'id='+post_id+'&token='+token+'&likes='+num_likes,
success: function(html)
{
    $("#like_container-"+id).empty().html(html);

}

});
}

And the likepost.php page is a script similar to the one on this page

Like a Facebook Post externally using Graph Api - example

This worked really well for me. It also let's me update the number of likes that the post has on the front end right above the like button if a like has been made. Good luck!

UPDATE

If you want to check if the user already likes a post, it's pretty simple w/ the facebook graph api

//Create Post Url
$post_url = "https://graph.facebook.com/" . $Page/User_id . "/posts?access_token=". urlencode($access_token);

//Get Json Contents
$resp = file_get_contents($post_url,0,null,null);

//Store Post Entries as Array
$the_posts = json_decode($resp, true);

foreach ($the_posts['data'] as $postdata) {

    foreach ($postdata['likes']['data'] as $like){

        if($like['id']==$user){

        $liked=1;

        }else{continue;}                                                
    }

    if($liked==1){
     //do something
    }

}

This assumes that you already have a facebook user id for the logged in user, in this example, stored in the variable $user.