Function to return highest value in an array

function MaxArray($arr){
    $maxValue = 0;
    foreach($arr as $element)
    {
        if(count($element)>1)
        {
            $tempMax = MaxArray($element);
            if($tempMax > $maxValue)
            {
                $maxValue = $tempMax;
            }
        }else{

            if($element > $maxValue)
            {
                $maxValue = $element;
            }
        }
    }
    return $maxValue;
}