Question 304967 in PHP Question posted in
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create one array from two array with same key but diff value in php

I have two array with same key but diff value
example :

(
    "2"=> 6,
    "5"=> 1
),
(
    "2"=> 1,
    "5"=> 3
)

I want to create new array with the same key but replace highest value
like this

 (
    "2"=> 6,
    "5"=> 3
)

what should I do

Tags:

2

Answers


  1. 0

    Use a nested loop, check if the key is encountered for the first time or if the stored value for that key is less than the current value.

    Code: (Demo)

    $result = [];
foreach ($array as $row) {
    foreach ($row as $k => $v) {
        if (!isset($result[$k]) || $result[$k] < $v){
            $result[$k] = $v;
        }
    }
}
var_export($result);
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  2. 0

    You need to iterate getting the maximum value for each key, which you can do with a combination of array_keys, array_combine, array_map and array_column:

    $keys = array_keys(reset($arr));
$res = array_combine(
    $keys,
    array_map(
        function ($k) use ($arr) { return max(array_column($arr, $k)); },
        $keys)
    );
print_r($res);

    Output:

    Array
(
    [2] => 6
    [5] => 3
)

    Demo on 3v4l.org

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