While loop within While loop not looping

I have two possible solutions:

1.) it could be because you have a semi-colon after your while loop closing curly bracket.

2.) Whenever I user MySQL_fetch_array I index the $row variable.

like:

$query = "SELECT catID,cat_name,categoryColor FROM Categories";

                                                while ($row = mysqli_fetch_array($result)) {

                                                $cat_id = $row['catID'];
                                                $catName = $row['cat_name'];
                                                $catColor = $row['categoryColor'];

My example

while ($row = mysqli_fetch_array($result)) {

                                                $cat_id = $row[0];
                                                $catName = $row[1];
                                                $catColor = $row[2];