Sorting an array by multiple fields - php

Question

In my backend I have some code handling teams for a round robin group tournament, and in the end teams are returned in an array and contains match results/stats etc.
I have the following array which I want to sort by two fields in the following order: points (desc), round_difference (desc).
The final and correct order would be: TeamOne, TeamThree, TeamTwo.
How would I go on about this with an array in this format? Is it possible at all? I have looked into array_multisort() however my array keys/structure overall is a bit "odd" compared to the other code examples I found here on the page and was very confusing to me.
Hopefully someone can assist me in this.
Array
(
[1] => Array
(
[1] => Array
(
[id] => 1
[group] => 1
[name] => TeamOne
[tag] => One
[matches] => Array
(
[played] => 1
[won] => 0
[ot_won] => 1
[ot_lost] => 0
[lost] => 0
[round_difference] => 3
[points] => 2
)
)
[238] => Array
(
[id] => 238
[group] => 1
[name] => TeamTwo
[tag] => Two
[matches] => Array
(
[played] => 0
[won] => 0
[ot_won] => 0
[ot_lost] => 0
[lost] => 0
[round_difference] => 0
[points] => 0
)
)
[14] => Array
(
[id] => 14
[group] => 1
[name] => TeamThree
[tag] => Three
[matches] => Array
(
[played] => 1
[won] => 0
[ot_won] => 0
[ot_lost] => 1
[lost] => 0
[round_difference] => -3
[points] => 1
)
)
)

Answer 1

Try uasort() instead and compare the keys like so:
uasort($arr[1],function($a,$b){
# If the points are more/less right off the bat, return results
if($a['matches']['points'] < $b['matches']['points'])
return true;
# If they are the same
elseif($a['matches']['points'] == $b['matches']['points'])
# Compare round_difference sort by that
return ($a['matches']['round_difference'] < $b['matches']['round_difference']);
});
So, sorting something like this:
$arr = array(
1 => array(
1 => array(
'id' => 1,
'group' => 1,
'name' => 'TeamOne',
'tag' => 'One',
'matches' => array(
'played' => 1,
'won' => 0,
'ot_won' => 1,
'ot_lost' => 0,
'lost' => 0,
'round_difference' => 3,
'points' => 2
)
),
238 => array
(
'id' => 238,
'group' => 1,
'name' => 'TeamTwo',
'tag' => 'Two',
'matches' => array(
'played' => 0,
'won' => 0,
'ot_won' => 0,
'ot_lost' => 0,
'lost' => 0,
'round_difference' => 0,
'points' => 0,
)
),
14 => array
(
'id' => 14,
'group' => 1,
'name' => 'TeamThree',
'tag' => 'Three',
'matches' => array
(
'played' => 1,
'won' => 0,
'ot_won' => 0,
'ot_lost' => 1,
'lost' => 0,
'round_difference' => '-3',
'points' => 1,
)
),
17 => array
(
'id' => 17,
'group' => 1,
'name' => 'TeamFive',
'tag' => 'Five',
'matches' => array
(
'played' => 1,
'won' => 0,
'ot_won' => 0,
'ot_lost' => 1,
'lost' => 0,
'round_difference' => '-3',
'points' => 2,
)
)
)
);
Gives you:
Array
(
[1] => Array
(
[1] => Array
(
[id] => 1
[group] => 1
[name] => TeamOne
[tag] => One
[matches] => Array
(
[played] => 1
[won] => 0
[ot_won] => 1
[ot_lost] => 0
[lost] => 0
[round_difference] => 3
[points] => 2
)
)
[17] => Array
(
[id] => 17
[group] => 1
[name] => TeamFive
[tag] => Five
[matches] => Array
(
[played] => 1
[won] => 0
[ot_won] => 0
[ot_lost] => 1
[lost] => 0
[round_difference] => -3
[points] => 2
)
)
[14] => Array
(
[id] => 14
[group] => 1
[name] => TeamThree
[tag] => Three
[matches] => Array
(
[played] => 1
[won] => 0
[ot_won] => 0
[ot_lost] => 1
[lost] => 0
[round_difference] => -3
[points] => 1
)
)
[238] => Array
(
[id] => 238
[group] => 1
[name] => TeamTwo
[tag] => Two
[matches] => Array
(
[played] => 0
[won] => 0
[ot_won] => 0
[ot_lost] => 0
[lost] => 0
[round_difference] => 0
[points] => 0
)
)
)
)