Display unique results and count duplicate results multi-dimentional array - php

Question

Here is my multi-dimensional array:
Array
(
[0] => Array
(
[H2H_Id] => T32
[Team1_Id] => T4
[Team1] => Juan Arraya - Max LePivert
[Team2_Id] => T205
[Team2] => Marco Grangeiro - Jeff Morneau
[Winners_Id] => T4
[MatchUps_Id] => M32
)
[1] => Array
(
[H2H_Id] => T39
[Team1_Id] => T205
[Team1] => Marco Grangeiro - Jeff Morneau
[Team2_Id] => T4
[Team2] => Juan Arraya - Max LePivert
[Winners_Id] => T205
[MatchUps_Id] => M32
)
[2] => Array
(
[H2H_Id] => T9
[Team1_Id] => T3
[Team1] => Marco Grangeiro - George Wilkinson
[Team2_Id] => T4
[Team2] => Juan Arraya - Max LePivert
[Winners_Id] => T4
[MatchUps_Id] => M9
)
)
I want the output to be:
Juan Arraya - Max LePivert 1 vs. 1 Marco Grangeiro - Jeff Morneau
Juan Arraya - Max LePivert 1 vs. 0 Marco Grangeiro - George Wilkinson
So basically, I want to display the different match ups separately by using MatchUps_Id and print the names of the teams Team1 and Team2. Based on the Winners_Id I want to add a counter to keep track of the wins per team per match up.
Keep in mind that these results are coming from user inputs which will make the multi-dimensional array different every time I request input from the user passed on by field1 and field2.
This is what I have so far in code:
$query2 = "SELECT HeadToHead.H2HNo H2H_Id, H2HTeam1Id Team1_Id, H2HTeam1 Team1, H2HTeam2Id Team2_Id, H2HTeam2 Team2, WinnersId Winners_Id, MatchUps.MatchUpsNo MatchUps_Id
FROM HeadToHead
JOIN MatchUps ON HeadToHead.MatchUpsNo=MatchUps.MatchUpsNo
WHERE ((H2HTeam1 LIKE '%$field1%' OR H2HTeam2 LIKE '%$field1%') AND (H2HTeam1 LIKE '%$field2%' OR H2HTeam2 LIKE '%$field2%'))";
$result2 = mysql_query($query2);
$num2 = mysql_num_rows($result2);
$arr2 = array();
if($num2 > 0) {
while($row2 = mysql_fetch_assoc($result2)) {
$arr2[] = $row2;
}
}
I get the desired results from the code above.
I think I have done a lot of research on this matter but what I am trying to accomplish seems to be different than what is out there.
Any help is much appreciated.

Answer 1

You can group the matchups together by 'MatchUps_Id' like this:
foreach ($arr2 as $match) {
// create some short ids to make the next part more readable
$id = $match['MatchUps_Id'];
$t1 = $match['Team1_Id'];
$t2= $match['Team2_Id'];
if (!isset($matchups[$id][$t1]['name'])) {
// initialize if this matchup has not yet been created
$matchups[$id][$t1]['name'] = $match['Team1'];
$matchups[$id][$t2]['name'] = $match['Team2'];
$matchups[$id][$t1]['wins'] = (int) ($match['Winners_Id'] == $match['Team1_Id']);
$matchups[$id][$t2]['wins'] = (int) ($match['Winners_Id'] == $match['Team2_Id']);
} else {
// increment wins if the matchup already exists
$matchups[$id][$t1]['wins'] += $match['Winners_Id'] == $match['Team1_Id'];
$matchups[$id][$t2]['wins'] += $match['Winners_Id'] == $match['Team2_Id'];
}
}
Using $t1 and $t2 as second-level keys allows you to increment the win count for respective teams without needing to know which one is which. The expression $match['Winners_Id'] == $match['Team1_Id'] returns a boolean, which will be implicitly cast to an integer 0 or 1 when used with +=, but must be explicitly cast using (int) when initializing.
After you have grouped your array and counted the wins, you can output the results like this:
foreach ($matchups as $matchup) {
list($a, $b) = array_values($matchup);
echo "$a[name] $a[wins] vs. $b[wins] $b[name]<br>";
}