- $emojis[$row['thr-parent-id']][$index]['total'] = $emojis[$row['thr-parent-id']][$emoji]['total'] ?? 0 + $row['total'];
- $emojis[$row['thr-parent-id']][$index]['title'] = array_unique(array_merge($emojis[$row['thr-parent-id']][$emoji]['title'] ?? [], explode($separator, $row['title'])));
+ $emojis[$row['thr-parent-id']][$index]['total'] = ($emojis[$row['thr-parent-id']][$index]['total'] ?? 0) + $row['total'];
+ $emojis[$row['thr-parent-id']][$index]['title'] = array_unique(array_merge($emojis[$row['thr-parent-id']][$index]['title'] ?? [], explode($separator, $row['title'])));