Find & track max value in a multidimensial array - php

Question

I have a multidimensional array that looks like this:
Array
(
[0] => Array
(
[id] => 2280764150
[label] => Some Label A
[pda] => 5.34
[prt] => 67
[kps] => 12436
[xmv] => 1.24
)
[1] => Array
(
[id] => 2273499083
[label] => Some Label B
[pda] => 2.99
[prt] => 97
[kps] => 212436
[xmv] => 7.78
)
[2] => Array
(
[id] => 2273045947
[label] => Some Label C
[pda] => 6.34
[prt] => 157
[kps] => 1436
[xmv] => 2.34
)
)
What I would like to do is find out which array element has the max value for each of items pda prt kps and xmv. It's not so much I want to know what the max value is, but I want to know which one has the max elements for each. So Some Label C would be logged as having max pda, Some Label B having max value for kps and so on.
I could do this with a few loops, but was looking for a more elegant solution.

Answer 1

Here's another one. I'm not sure if it's elegant, though.
$arr = array(
array('id'=>2280764150,'label'=>'Some Label A','pda'=>5.34,'prt'=>67,'kps'=>12436,'xmv'=>1.24),
array('id'=>2273499083,'label'=>'Some Label B','pda'=>2.99,'prt'=>97,'kps'=>212436,'xmv'=>7.78),
array('id'=>2273045947,'label'=>'Some Label C','pda'=>6.34,'prt'=>157,'kps'=>1436,'xmv'=>2.34),
);
$max = array('pda'=>0,'prt'=>0,'kps'=>0);
foreach (array_keys($max) as $key) {
array_walk($arr,'get_max',$key);
}
function get_max($inner_arr,$index,$key) {
global $max;
if ($inner_arr[$key] > $max[$key]['max'])
$max[$key] = array('index'=>$index,'max'=>$inner_arr[$key]);
}
print_r($max);
EDIT: ABOVE CODE SHORTENED
$max = array('pda'=>0,'prt'=>0,'kps'=>0);
array_walk($arr,'get_max');
function get_max($inner_arr,$index) {
global $max;
foreach (array_keys($max) as $key) {
if ($inner_arr[$key] > $max[$key]['max'])
$max[$key] = array('index'=>$index,'max'=>$inner_arr[$key]);
}
}

Answer 2

This is the most elegant solution I can think of:
$max=Array();
foreach ($yourArray as $key=>$nestedArray) {
foreach ($nestedArray as $item => $val) {
if (!isset($max[$item]) || $max[$item]['val']<$val) {
$max[$item]['val']=$val;
$max[$item]['key']=$key;
}
}
}