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@ 2023-12-15T00:08:19Z

<?php

$array = [
    ["2" => 6, "5" => 1],
    ["2" => 1, "5" => 3],
];

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

Output
Performance
VLD
References
Branches

var_export: documentation ( source)

preferences:dark modelive previewkey bindings

34.17 ms | 404 KiB | 5 Q