adding like comment issue using graph api - facebook-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 , 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>'
<div class="unliked"></div>
</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.