sort array of product variables

product_array_sort.php

    if(get_field('variations')) :

        $product_variations = get_field('variations');

        $product_variations_count = count( get_field( 'variations' ) );

        echo $product_variations_count;

        if($product_variations_count > 1) :

            // vars
            $order = array();

            // populate order for length
            foreach( $product_variations as $i => $row ) {
                $order[ $i ] = $row['length'];
            }
            // multisort for longest
            array_multisort( $order, SORT_DESC, $product_variations );
            $longest = $product_variations[0];    
            // multisort for shortest
            array_multisort( $order, SORT_ASC, $product_variations );
            $shortest = $product_variations[0];    

            // populate order for width
            foreach( $product_variations as $i => $row ) {
                $order[ $i ] = $row['width'];
            }

            // multisort for widest
            array_multisort( $order, SORT_DESC, $product_variations );
            $widest = $product_variations[0];    
            // multisort for narrowest
            array_multisort( $order, SORT_ASC, $product_variations );
            $narrowest = $product_variations[0];

            // populate order for price
            foreach( $product_variations as $i => $row ) {
                $order[ $i ] = $row['price'];
            }
            // multisort for most expensive
            array_multisort( $order, SORT_DESC, $product_variations );
            $costliest = $product_variations[0];    
            // multisort for least expensive
            array_multisort( $order, SORT_ASC, $product_variations);
            $cheapest = $product_variations[0];

        else :

            $single_length = $product_variations[0]['length'];
            $single_width = $product_variations[0]['width'];
            $single_price = $product_variations[0]['price'];

        endif;
    endif;