Calculate total sum of all values from all rows of a 2d array

Question

I'm having a 2-dimensional array and I need to get the total sum of the values.

[
    [
        'agent_example1' => 0,
        'agent_example2' => 2,
        'agent_example3' => 0,
        'agent_example4' => 1,
        '' => 0,
    ],
    [
        'agent_example1' => 0,
        'agent_example2' => 1,
        'agent_example3' => 0,
        'agent_example4' => 0,
        '' => 0,
    ],
    [
        'agent_example1' => 0,
        'agent_example2' => 3,
        'agent_example3' => 0,
        'agent_example4' => 0,
        '' => 0,
    ],
]

Result should be 7.

Answer 1

Or even easier:

function crash_reporter($evaluation){

    $sum = 0;
    foreach ($evaluation as $agent){    
        unset($agent['time']);
        $sum += array_sum($agent);
    }
    echo $sum;
}