How to calculate star rating?

Question

I have one product and i want to calculate 5 star rating on the basic like and dislike

for example product have

• like = 200 // that means 200 user like that product
• dislike =10 // that means 10 user dislike that particular product

Answer 1

Here's a simple PHP function:

<?php
    function calculateStarRating($likes, $dislikes){ 
        $maxNumberOfStars = 5; // Define the maximum number of stars possible.
        $totalRating = $likes + $dislikes; // Calculate the total number of ratings.
        $likePercentageStars = ($likes / $totalRating) * $maxNumberOfStars;
        return $likePercentageStars;
    }
?>

To call the function:

<?php
    $likeCount = 190; 
    $dislikeCount =10; 
    $calculatedRating = calculateStarRating($likeCount, $dislikeCount); 
?>

To use the calculated value in Javascript:

<script>
    var rating = <?php echo $calculatedRating; ?>;
    alert(rating); // For testing purposes.
</script>

These would get you started.