php - Sorting a multi-dimensional Array by value -

i have array , want sort (asc)?

$stand_array[$player_name][$player_points] = $player_rank; 

print_r

array ( [player1] => array     (         [50] => 5.7     )  [player2] => array     (         [40] => 4.2     )  [player3] => array     (         [30] => 3.7     )  [player4] => array     (         [20] => 2.3     )  [player5] => array     (         [10 => 1.5     )  [player6] => array     (         [60] => 6.3     ) ) 

would me solve array on $player_rank (asc)?

nb: tried function, did not work:

function sortbyorder($a, $b) { return $a[$player_rank] - $b[$player_rank]; } usort($myarray, 'sortbyorder'); 

the variable $player_rank not visible sortbyorder function scope. also, indexes different in each player array, need access this:

function sortbyorder($a, $b)  {      $a = end($a);     $b = end($b);      if ($a == $b)      {        return 0;     }      return ($a < $b) ? -1 : 1; } usort($myarray, 'sortbyorder'); 

and if want save keys in $myarray must use uasort function instead of usort.