// i wanted to remove first array inside to array
// but doesn't work for me : array_shift();

$cargo_file = 
Array
(
    [0] => Array
        (
            [0] => Country
            [1] => CountryCode
            [2] => City
            [3] => CityOtherLanguage
            [4] => PostCode
            [5] => Days
        )

    [1] => Array
        (
            [0] => Turkey
            [1] => TR
            [2] => Istanbul
            [3] => Istanbul
            [4] => 34930
            [5] => 9
        )

)

$cargo_file = array_shift($cargo_file);

echo "<pre>";
print_r($cargo_file);
echo "</pre>";

// result after :

/*
Array
(
    [0] => Country
    [1] => CountryCode
    [2] => City
    [3] => CityOtherLanguage
    [4] => PostCode
    [5] => Days
)
*/

i developed a solution

function removeFirstArray($array){

    $new_array = [];
    foreach ($array as $key => $value) {
        if($key > 0){
            $new_array[] = $value;
        }   
    }

    return $new_array;
}

$cargo_file= removeFirstArray($cargo_file);

echo "<pre>";
print_r($cargo_file);
echo "</pre>";

Array
(
    [0] => Array
        (
            [0] => Turkey
            [1] => TR
            [2] => Istanbul
            [3] => Istanbul
            [4] => 34930
            [5] => 9
        )

)