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 , if i loged in i can add like or comment (application is for me) , am getting the all permission nedded from the user , so how can i give him permission to add like / comment.

CODE :

$facebook = new Facebook(array(
            'appId' => '',
            'secret' => '',
            'cookie' => true,
        ));

$user = $facebook->getUser();
if ($user) {  
    if (session_id()) {

    } else {
        session_start();
    }

    $access_token = $facebook->getAccessToken();
    //check permissions list

    $permissions_list = $facebook->api(
            '/me/permissions', 'GET', array(
        'access_token' => $access_token
            )
    );

    //check if the permissions we need have been allowed by the user
    //if not then redirect them again to facebook's permissions page

    $permissions_needed = array('publish_stream', 'read_stream', 'manage_pages');

    foreach ($permissions_needed as $perm) {
        if (!isset($permissions_list['data'][0][$perm]) || $permissions_list['data'][0][$perm] != 1) {
            $login_url_params = array(
                'scope' => 'publish_stream,read_stream,manage_pages',
                 'fbconnect' =>  1,
        'display'   =>  "page",
                'redirect_uri' => 'http://localhost/fb/index.php',
            );
            $login_url = $facebook->getLoginUrl($login_url_params);
            header("Location: {$login_url}");
            exit();
        }
    }
}else {

    //if not, let's redirect to the ALLOW page so we can get access
    //Create a login URL using the Facebook library's getLoginUrl() method

    $login_url_params = array(
        'scope' => 'publish_stream,read_stream,manage_pages',
                'fbconnect' =>  1,
        'display'   =>  "page",
        'redirect_uri'=>'http://localhost/fb/index.php',
    );
    $login_url = $facebook->getLoginUrl($login_url_params);

    //redirect to the login URL on facebook
    header("Location: {$login_url}");
    exit();
}

$logoutUrl = $facebook->getLogoutUrl();

and if the user click on like button :

            jQuery('ul.fb_list a').click(function(){

               var comm_id = jQuery(this).attr("class");

                    jQuery.post('https://graph.facebook.com/'+comm_id+'/likes/',{
                        access_token : "<?php echo $access_token ?>"

                    });
            });  

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.