Calculate overall and division ranking via arrays - php

Question

This is a follow-up to Detect future duplicate values while iterating through MySQL results in PHP.
I have an SQL query which produces the results:
team_id division_id wins
-------------------------------
10 2 44
9 2 42
5 1 42
2 1 42
3 1 41
11 2 40
1 1 36
8 2 31
7 2 29
12 2 24
4 1 20
6 1 18
I'm trying to calculate a given team's overall and divisional rankings.
For example, team_id = 1:
Overall: 7
Divisional: 4
For team_id = 3:
Overall: 5
Divisional: 3
For team_id = 9:
Overall: T-2 //must indicate tie
Divisional: 2
As you can see from the linked previous question/answer, I can calculate the Overall rank just fine. The issue comes with calculating the divisional rank as well (including properly handling ties).
I've tried storing the results in a multi-dimensional array like $arr['wins']['division_id']['team_id'], such as...
44 => 2 => 10
42 => 1 => 5
2
2 => 9
41 => 1 => 3
40 => 11 => 2
...
But am stuck as to how to iterate through and get my two respective ranks, as well as detecting ties appropriately for each.

Answer 1

Try something like this:
// Dataset as defined on question
$arr = array(
array('team_id' => 10, 'division_id' => 2, 'wins' => 44),
array('team_id' => 9, 'division_id' => 2, 'wins' => 42),
array('team_id' => 5, 'division_id' => 1, 'wins' => 42),
array('team_id' => 2, 'division_id' => 1, 'wins' => 42),
array('team_id' => 3, 'division_id' => 1, 'wins' => 41),
array('team_id' => 11, 'division_id' => 2, 'wins' => 40),
array('team_id' => 1, 'division_id' => 1, 'wins' => 36),
array('team_id' => 8, 'division_id' => 2, 'wins' => 31),
array('team_id' => 7, 'division_id' => 2, 'wins' => 29),
array('team_id' => 12, 'division_id' => 2, 'wins' => 24),
array('team_id' => 4, 'division_id' => 1, 'wins' => 20),
array('team_id' => 6, 'division_id' => 1, 'wins' => 18));
$divisionTeam = array();
$divisionWins = array();
foreach($arr as $team) {
$divisionTeam[$team['division_id']][] = $team['team_id'];
$divisionWins[$team['division_id']][] = $team['wins'];
}
echo "<pre>";
foreach (array_keys($divisionTeam) as $division_id) {
$rank = 0;
$prevWins = -1;
echo "DIVISION $division_id \n";
foreach ($divisionTeam[$division_id] as $index => $team_id) {
if ($prevWins == $divisionWins[$division_id][$index]) {
echo $team_id . " T - " . $rank . "\n";
}
else {
$rank++;
echo $team_id . " " . $rank . "\n";
}
$prevWins = $divisionWins[$division_id][$index];
}
}
echo "</pre>";