find the biggest value in associative arrays php - php

Question

I would like to find the biggest sum in associative array. I have information for 2 years and i have found the sum for each year and now I want to find which one is bigger and which year this sum belongs to.
<?php
$year = array (
"Year 2015 " => array(
"Televizor " => "3",
"Lavatrice" => "4",
"Kompjuter" => "5",
"printer" => "5",
),
"Year 2016 " => array(
"Televizor " => "3",
"lavatrice" => "7",
"kompjuter" => "4",
"printer" => "1",
)
);
foreach($year as $key => $product){
echo "<br>";
echo "$key";
echo"<table border=1 cellspacing=0>
<tr>
<td>Produkti</td>
<td>Sasia</td>
</tr>";
echo "<br>";
foreach( $product as $key => $value){
echo "<tr>
<td>$key</td>
<td>$value</td>
</tr>";
}
echo "</table>";
}
foreach($year as $key => $product){
echo"$key";
$arrayOfValues=array_values($product);
$arraySum=array_sum($arrayOfValues);
$avg=$arraySum/count($arrayOfValues);
echo "Average=$avg";
echo " ";
$maxValueArray=array();
array_push($maxValueArray, $arraySum);
echo "Sum=$maxValueArray[0]";
echo "<br>";
}
?>
and this is the output :
Year 2015
Produkti Sasia
Televizor 3
Lavatrice 4
Kompjuter 5
printer 5
Year 2016
Produkti Sasia
Televizor 3
lavatrice 7
kompjuter 4
printer 1
Year 2015 Average=4.25 Sum=17
year 2016 Average=3.75 Sum=15
i would like to print "Year 2015 has the biggest sum =17 "

Answer 1

To do it, you just need to create an array with the valuation.
$yearSumValues = array_map('array_sum', $year);
$max = max($yearSumValues);
$maxYearKey = array_search($max, $yearSumValues);
echo 'Max sum is: ', $max, '<br />';
echo 'Data key is: ', $maxYearKey, '<br />';
if( !is_null($maxYearKey) ) {
echo 'Values are: ', var_dump($year[$maxYearKey]);
}
So, now, in $max you will have the biggest value. So, $maxYearKey contains the key of the biggest year (be careful with equalities).
var_dump($year[$maxYearKey]);
Produkti Sasia
Televizor 3
Lavatrice 4
Kompjuter 5
printer 5
Compact version
$yearSumValues = array_map('array_sum', $year);
if( ($maxYearKey = array_search(max($yearSumValues), $yearSumValues)) != null ) {
echo 'found ', $maxYearKey, ' with values ', var_dump($year[$maxYearKey]);
}
You can play: http://phplab.io/lab/IgJkR

Answer 2

Short solution using array_reduce, array_sum and array_search functions:
$result = array_reduce($year, function ($prev, $item) {
return (array_sum($prev) > array_sum($item))? $prev : $item;
}, []);
print_r(array_search($result, $year) ." has the biggest sum = ". array_sum($result));
The output:
Year 2015 has the biggest sum = 17
http://php.net/manual/en/function.array-reduce.php