How to interchange multi dimension array keys

[bn102]

i have an array format like (mysql result array)\[code\]$new_array=Array ( [0] => Array ( [quantity] => 5 ) [1] => Array ( [quantity] => 25 ) [2] => Array ( [quantity] => 20 ) )\[/code\]I have to convert this array into the following format\[code\]$new_array['quantity'][0]=5$new_array['quantity'][1]=25$new_array['quantity'][2]=20\[/code\]How to convert this array format using any standard array method.