I have an array like this. I need to sort countries (array key) by [0][amount] value.
Array
(
[Germany] => Array
(
[0] => Array
(
[amount] => 50
[count] => 1
)
)
[Poland] => Array
(
[0] => Array
(
[amount] => 80
[count] => 2
)
)
)
Result should be Poland first and Germany. Any idea in PHP?