Wrong percentage in rating system

Hello guys,

Can someone help me with a code change?

I use this plugin in my wordpress site:
https://github.com/lesterchan/wp-postratings

But something is wrong with the thumbs voting.

Here goes some tests that I did:

With Values: -1, +1

I have talked with the plugin author but he is not offering support for this fix. He said:

I'm not interested in the star rating, only up/down rating.



I was checking the code in this file:
https://github.com/lesterchan/wp-postratings/blob/master/wp-postratings.php

And I have found this:

if($post_ratings_score == 0 || $post_ratings_users == 0) {
        $post_ratings = 0;
        $post_ratings_average = 0;
        $post_ratings_percentage = 0;
    } else {
        $post_ratings = round($post_ratings_average, 1);
        $post_ratings_percentage = round((($post_ratings_score/$post_ratings_users)/$ratings_max) * 100, 2);
    }

Code (markup):

Is this the right code to fix this? Is it hard to found a solution?

 

I have checked the code and this wrong % showing I think is because of when user dislike the vote value increment by 1 added to the total

for eg. at this:

$post_ratings_percentage = round((($post_ratings_score/$post_ratings_users)/$ratings_max) * 100);

PHP:

$post_ratings_score=+2 like -2 dislike

$post_ratings_users =total votes

$ratings_max= 2

if 5 vote up and 1 down the this function calculate

(8/6/2)*100) = 66 %
but if we don't add 1 when dislike to total rated user then this function work good

(8/5/2)*100)=80%

but for fix this i still not find any solution. Am I close?

 

Pseudocode, not based on your real variables just verbose meanings.

$percent = ($votes_up / ($votes_up + $votes_down)) * 100;

This assumes $votes_down is a positive number, if negative subtract instead of add. Remember, - a - is a +

You just need to divide the votes up by the total number of up and down.

 

Thank you bud, worked perfectly

 

Oh, and don't forget to trap zero votes manually -- divide by zero errors can drive you nutters.