GET Max array from two array PHP - php

Question

I want which is the biggest array from following array.
[13] => Array
(
[0] => 1
[1] => 3
[2] => 9
)
[15] => Array
(
[0] => 1
[1] => 5
[2] => 8
)
[33] => Array
(
[0] => 1
[1] => 9
[2] => 13
)
I want a code that would return last array with key 33.
Please Help.

Answer 1

Use max to get the maximum from the keys of your array
$yourarray=array(13 => Array
(
0 => 1,
1 => 3,
2 => 9,
),
15 => Array
(
0 => 1,
1 => 5,
2 => 8,
),
33 => Array
(
0 => 1,
1 => 9,
2 => 13,
));
$arr=max(array_keys($yourarray));
print_r($yourarray[$arr]);
Output:
Array
(
[0] => 1
[1] => 9
[2] => 13
)

Answer 2

This should do the trick...
<?php
$tests = array(
13 => array(1,3,9),
15 => array(1,5,8),
33 => array(1,9,13)
);
$array_totals = array_map('array_sum', $tests);
krsort($array_totals);
$maxArray = each($array_totals);
var_dump($maxArray);
Gives
array (size=4)
1 => int 23
'value' => int 23
0 => int 33
'key' => int 33

Answer 3

Not the most beautiful thing, but readable ;)
$tests = array(
13 => array(1,3,9),
15 => array(1,5,8),
33 => array(1,9,13)
);
$max = -1;
$max_key = -1;
foreach ($tests as $k => $v) {
$cur_max = max($v);
if ($cur_max >= $max) {
$max = $cur_max;
$max_key = $k;
}
}
echo "max: $max; max_key: $max_key";
Gives:
max: 13; max_key: 33
To make it more beautiful: use array_map and sorting.