Group and Sum this Array - php

Question

I have an array that's output is this:
Array ( [winners] =>
Array ( [0] => Gold Member
[1] => CROTCH SNIFFER
[2] => TEAM #1 )
[prizeTotal] => 20 )
Array ( [winners] =>
Array ( [0] => TEAM #1
[1] => CROTCH SNIFFER )
[prizeTotal] => 60 )
Array ( [winners] =>
Array ( [0] => Gold Member
[1] => TEAM #1 )
[prizeTotal] => 30 )
Array ( [winners] =>
Array ( [0] => TEAM #1
[1] => TEAM #2
[2] => SCREW-NUT-BOLT )
[prizeTotal] => 90 )
Please forgive the names...it's not my DB.
I can not change the way the array is show here.
With that being said how can I group and sum?
1. For each winners array there is a prizeTotal below the team names. That prize total should be the value of each teamName above it.
Example
Array ( [winners] =>
Array ( [0] => Gold Member
[1] => CROTCH SNIFFER
[2] => TEAM #1 )
[prizeTotal] => 20 )
Gold Member should have 20
CROTCH SNIFFER should have 20
TEAM #1 should have 20 AND
Array ( [winners] =>
Array ( [0] => TEAM #1
[1] => CROTCH SNIFFER )
[prizeTotal] => 60 )
TEAM #1 should have 60
CROTCH SNIFFER sould have 60....etc....
Then I want to group by team name and sum so that I can display...
CROTCH SNIFFER = 80
Gold Member = 50
TEAM #1 = 200
Team #2 = 90.
Thanks in advance...

Answer 1

Assuming you can collect all your arrays into one i.e. :
$arrays = array($array1,$array2,....,$arrayn);
then
$grouping = array();
foreach($arrays AS $array)
{
foreach($array['winners'] AS $k=>$v)
{
//check if the array key is a number, will contain a team, and if that
//them is not alreay listed
if(is_numeric($k) && !array_key_exists($v,$grouping))
$grouping[$v] = 0;
//sum the prize to the team's sum
$grouping[$v] += intval($array['winners']['prizeTotal']);
}
}
//the following is just for debugging
print_r($grouping);
this should produce something like:
$grouping[TEAM #1] = 200
$grouping[TEAM #2] = 90
$grouping[CROTCH SNIFFER] = 200
...

Answer 2

You need to make a new array to hold your results, then for each of your existing arrays, check if you're already processed one for that team
If you have, then simply add the prizeTotal to the prizeTotal stored in your new array's entry for that team.
If not, simply add the team's entry to your new array.

Answer 3

I have made a function that imitates mysql SUM() and GROUP BY. I hope it will fit your needs:
$in_a = array(
array("a" => 0,"b"=>0,"s"=> 1),
array("a" => 0,"b"=>0,"s"=> 2),
array("a" => 1,"b"=>1,"s"=> 1),
array("a" => 0,"b"=>1,"s"=> 1),
array("a" => 0,"b"=>1,"s"=> 1),
array("a" => 1,"b"=>0,"s"=> 1),
array("a" => 0,"b"=>1,"s"=> 1),
array("a" => 1,"b"=>1,"s"=> 1),
array("a" => 1,"b"=>0,"s"=> 1),
);//input array exaple
$group_by_a = array("a","b");//input array will be grouped by these
$sum_a = array("s"); //'s' values of input will be summed
$out_a = array(); //this is the output array
foreach($in_a as $in_i => $in)
{
$add = false;
foreach($out_a as $out_i => $out)
{
$add = true;
foreach($group_by_a as $group_by)
if($in[$group_by] != $out[$group_by])
{
$add = false;
break;
}
if($add)
{
foreach($sum_a as $sum)
$out_a[$out_i][$sum] += $in[$sum];
break;
}
}
if(!$add)
{
foreach($group_by_a as $group_by)
$out_a[$in_i][$group_by] = $in[$group_by];
foreach($sum_a as $sum)
$out_a[$in_i][$sum] = $in[$sum];
}
}
the result:
Array
(
[0] => Array
(
[a] => 0
[b] => 0
[s] => 3
)
[2] => Array
(
[a] => 1
[b] => 1
[s] => 2
)
[3] => Array
(
[a] => 0
[b] => 1
[s] => 3
)
[5] => Array
(
[a] => 1
[b] => 0
[s] => 2
)
)