$weight = [ 'Pete' => 75, 'Benjamin' => 89, 'Jonathan' => 101 ]; ksort($weight);
To PHP sort array by key, you should use: ksort() (for ascending order) or krsort() (for descending order). To PHP sort array by value, you will need functions: asort() and arsort() (for ascending and descending orders).
//php 7+ usort($inventory, function ($item1, $item2) { return $item1['price'] <=> $item2['price']; });