3v4l.org

run code in 300+ PHP versions simultaneously

@ 2016-11-24T11:31:09Z

<?php

$consumption = [
    'MONDAY'    => [
        'REFRIGERATOR'   => [
            3,
            9,
            7,
        ],
        'WASHINGMACHINE' => [
            2,
            4,
            2,
            8,
        ],
    ],
    'TUESDAY'   => [
        'REFRIGERATOR' => [
            5,
            3,
            8,
        ],
        'OVEN'         => [
            4,
            1,
            4,
        ],
    ],
    'WEDNESDAY' => [
        'TV'           => [
            6,
            9,
        ],
        'REFRIGERATOR' => [
            2,
            3,
            5,
            2,
        ],
    ],
    'THURSDAY'  => [
        'TV'  => [
            5,
            3,
            3,
            2,
        ],
        'FAN' => [
            4,
            9,
            8,
            5,
        ],
    ],
    'FRIDAY'    => [
        'WASHINGMACHINE' => [
            8,
            5,
        ],
        'OVEN'           => [
            3,
            9,
            7,
        ],
    ],
]; 
$result = [];
foreach($consumption as $v)
{
    foreach($v as $v_k => $v_v)
    {
        if(isset($result[$v_k]))
            $result[$v_k] += array_sum($v_v);
        else
            $result[$v_k] = array_sum($v_v);
    }
}

print_r($result);

array_sum: documentation ( source)
print_r: documentation ( source)

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