max() function

[Schlo_50]

Hello,

 

If I have the following array, how would I use php's max() function to find the largest number of say the traction attribute?

 

Array
(
    [0] => Array
        (
            [manufacturer] => Nissan
            [model] => 350Z
            [modexp] => 30000
            [traction] => 500
            [aerodynamics] => 3000
            [acceleration] => 1500
            [styling] => 6000
        )

    [1] => Array
        (
            [manufacturer] => Toyota
            [model] => Celica
            [modexp] => 15000
            [traction] => 500
            [aerodynamics] => 3000
            [acceleration] => 1500
            [styling] => 6000
        )

    [2] => Array
        (
            [manufacturer] => Nissan
            [model] => Skyline
            [modexp] => 50000
            [traction] => 500
            [aerodynamics] => 3000
            [acceleration] => 1500
            [styling] => 6000
        )

)

 

 

I've read the information http://php.net/manual/en/function.max.php here but can't figure out how to apply it to my situation?

 

Thanks in advance!

[Mchl]

You can't. It will only work on single dimension arrays.

To find max value of traction you can do

$maxTraction = 0;

foreach($cars as $model) {
  if($model['traction'] > $maxTraction) {
    $maxTraction = $model['traction'];
  }
}

[Schlo_50]

That would be why I'm struggling.

 

Thanks for the other suggestion.

[Schlo_50]

Hmm.. I've tried the following but the the car with the largest 'styling' attribute doesn't display. It only shows when it wins overall as well as on the 'styling' attribute.

 

<?php 

function getWinner($chosen, $attr = null) {
    $index = $topStats = 0;

   foreach ($chosen as $key => $data) {
        if ($attr != null && $data[$attr] > $topStats) {
           $topStats = $data[$attr];
           $index = $key;
           continue;
        }
        if (array_sum($data) > $topStats) {
            $index = $key;
            $topStats = array_sum($data);
        }

    }
  return $chosen[$index];
}



echo '<pre>';

// randomSet contains my final array of cars to compare
$winner = getWinner($randomSet);
$winner_on_attribute = getWinner($randomSet, 'styling');

print "<h1>Overall Winner</h1>";
print_r($winner);

print "<h1>Styling attribute Winner</h1>";
print_r($winner_on_attribute);

echo '</pre>';

?>