php how to calculate numbers sum after the loop - php

Question

I have following loop to calculate comments and likes
function AddCampaignDetails($next=null){
$AccessToken = ACCESS_TOKEN;
$url = "https://api.instagram.com/v1/tags/canonfanatic/media/recent?access_token=".$AccessToken;
if($url !== null) {
$url .= '&max_tag_id=' . $next;
}
/*//Also Perhaps you should cache the results as the instagram API is slow
$cache = './'.sha1($url).'.json';
if(file_exists($cache) && filemtime($cache) > time() - 60*60){
// If a cache file exists, and it is newer than 1 hour, use it
$jsonData = json_decode(file_get_contents($cache));
}else{
$jsonData = json_decode((file_get_contents($url)));
file_put_contents($cache,json_encode($jsonData));
}*/
$Ch = curl_init();
curl_setopt($Ch, CURLOPT_URL, $url);
curl_setopt($Ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($Ch, CURLOPT_TIMEOUT, 20);
$Result = curl_exec($Ch);
curl_close($Ch);
$Result = json_decode($Result);
$Data = $Result->data;
//echo "<pre>"; print_r($Data); echo "</pre>";
$CommentsSum = 0;
$LikesSum = 0;
for($i=0; $i<count($Data); $i++){
$CommentsSum += $Data[$i]->comments->count;
$LikesSum += $Data[$i]->likes->count;
}
//echo ' Comments '.$CommentsSum;
//echo ' Likes '.$LikesSum;
echo "<br />";
if(isset($Result->pagination->next_url) && !empty($Result->pagination->next_url)){
$next = $Result->pagination->next_url;
$this->AddCampaignDetails($next);
}else{
$NextUrl = "";
die;
}
return $result;
}
After this loop, I have echo $CommentsSum; variable and get this output
183
306
320
42
Now I want above number sum 851.
Any idea?
Thanks.

Answer 1

Your $Data[$i]->comments->count must be a number, and it's seem that is a string, so it's merging string instead of doing math.
And If you really have a new line between each number (like you said in echo) maybe $Data[$i]->comments->count is equal to "183\n"
use for example :
$CommentsSum += intval($Data[$i]->comments->count)