Question

我需要创建带有运营商名称和绑定到它们的ID的数组。然后我想执行一些像int A[] = new int[5]; int B[] = new int[5]; int C[] = new int[5]; C[0] = 1; for (int i = 0; i <= 4; i++) { if (B[i] < C[i]) { A[i] = C[i] - 1; } else { A[i] = B[i] + 1; C[i] = B[i] + 3; B[i] = B[i] | C[i] - 1; } }这样会返回运营商名称的内容。

get_carrier_name_by_id(id)

这是保存数据的正确方法吗？

Answer 1

试试这个：

function get_carrier_name_by_id($id)
{
    $carriers = array (
        "DPD" => array(1,2,3),
        "DPD Pobranie" => array(4,5,6),
        "Poczta-Polska" => array(7,8,9),
        "Poczta-Polska pobranie" => array(10,11,12),
        "Paczkomat" => array(13,14,15),
        "Paczkomat pobranie" => array(16,17,18),
        "Osobisty" => array(19,20,21),
        "UPS" => array(22,23,24),
        "UPS pobranie" => array(25,26,27)
    );

    foreach($carriers as $name => $ids)
        if(in_array($id, $ids))
            return $name;

    return null;
}

echo '<pre>';
var_dump(get_carrier_name_by_id(122));
var_dump(get_carrier_name_by_id(12));

var_dump s的输出：

NULL
string(22) "Poczta-Polska pobranie"

Answer 2

查看array iterator。

使用迭代器查看下面的解决方案：

function get_carrier_name_by_id($id)
{
    $carriers = array(
        "DPD" => array(1, 2, 3),
        "DPD Pobranie" => array(4, 5, 6),
        "Poczta-Polska" => array(7, 8, 9),
        "Poczta-Polska pobranie" => array(10, 11, 12),
        "Paczkomat" => array(13, 14, 15),
        "Paczkomat pobranie" => array(16, 17, 18),
        "Osobisty" => array(19, 20, 21),
        "UPS" => array(22, 23, 24),
        "UPS pobranie" => array(25, 26, 27)
    );

    $it = new RecursiveIteratorIterator(new RecursiveArrayIterator($carriers));

    foreach ($it as $key => $val) {
        $key = $it->getSubIterator($it->getDepth() - 1)->key();
        if($val == $id){
            return $key;
        }
    }
}

echo get_carrier_name_by_id(3); //Output: DPD
echo get_carrier_name_by_id(12); //Output: Poczta-Polska pobranie
echo get_carrier_name_by_id(24); //Output: UPS

Answer 3

您可以使用array_filter()，in_array()和key()轻松获取运营商名称：

$key = 4;
$carrier = key( array_filter( $carriers, function( $row ) use( $key ) { return in_array( $key, $row ); } ) );
echo $carrier;

将输出：

DPD Pobranie

基本上，您必须将$carriers数组过滤为匹配的$key。您可以array_filter使用anonymous function：array_filter将每个数组元素传递给被调用函数，如果函数返回可评估为True的值，则在过滤后的数组中返回该元素，否则它被丢弃了。在您的情况下，我们检查元素项中是否有请求的密钥。

然后，我们使用key()返回已过滤数组的当前指向元素的键：刚创建数组，因此指针位于数组的开头。

如果需要，您可以将此脚本调整为函数：

function CarrierByID( $carriers, $key )
{
    return key( ... );
}

获取多维数组中的键

3 个答案: