PHP复杂嵌套数组解析：以Google Maps API响应为例提取关键数据

array(4) {
    ["destination_addresses"]=> array(4) {
        [0]=> string(19) "Walsall WS2 9PS, UK"
        [1]=> string(19) "Walsall WS2 9PS, UK"
        [2]=> string(19) "Walsall WS2 9PS, UK"
        [3]=> string(26) "Wolverhampton WV10 0QP, UK"
    }
    ["origin_addresses"]=> array(1) {
        [0]=> string(18) "Stone ST15 0FL, UK"
    }
    ["rows"]=> array(1) {
        [0]=> array(1) {
            ["elements"]=> array(4) {
                [0]=> array(3) {
                    ["distance"]=> array(2) { /* ... */ }
                    ["duration"]=> array(2) { /* ... */ }
                    ["status"]=> string(2) "OK"
                }
                [1]=> array(3) { /* ... */ }
                [2]=> array(3) { /* ... */ }
                [3]=> array(3) { /* ... */ }
            }
        }
    }
    ["status"]=> string(2) "OK"
}

<?php

// 假设 $destination 变量包含了上述Google Maps API返回的完整数组
$destination = [
    "destination_addresses" => [
        "Walsall WS2 9PS, UK",
        "Walsall WS2 9PS, UK",
        "Walsall WS2 9PS, UK",
        "Wolverhampton WV10 0QP, UK"
    ],
    "origin_addresses" => [
        "Stone ST15 0FL, UK"
    ],
    "rows" => [
        [
            "elements" => [
                [
                    "distance" => ["text" => "41.9 km", "value" => 41947],
                    "duration" => ["text" => "36 mins", "value" => 2134],
                    "status" => "OK"
                ],
                [
                    "distance" => ["text" => "41.9 km", "value" => 41947],
                    "duration" => ["text" => "36 mins", "value" => 2134],
                    "status" => "OK"
                ],
                [
                    "distance" => ["text" => "41.9 km", "value" => 41947],
                    "duration" => ["text" => "36 mins", "value" => 2134],
                    "status" => "OK"
                ],
                [
                    "distance" => ["text" => "40.9 km", "value" => 40924],
                    "duration" => ["text" => "41 mins", "value" => 2458],
                    "status" => "OK"
                ]
            ]
        ]
    ],
    "status" => "OK"
];

foreach ($destination['destination_addresses'] as $idx => $to) {
    // 检查当前行程元素的状态是否为 'OK'
    // 这一步非常重要，确保我们只处理有效的行程数据
    if (isset($destination['rows'][0]['elements'][$idx]) && $destination['rows'][0]['elements'][$idx]['status'] == 'OK') {
        echo '从 ' . $destination['origin_addresses'][0];
        echo ' 到 ' . $to;
        echo ' 距离 ' . $destination['rows'][0]['elements'][$idx]['distance']['text'];
        echo ' 耗时 ' . $destination['rows'][0]['elements'][$idx]['duration']['text'] . "\n";
    } else {
        // 如果状态不是 'OK' 或对应的元素不存在，可以进行错误处理或跳过
        echo '从 ' . $destination['origin_addresses'][0] . ' 到 ' . $to . ' 的行程数据不可用或状态异常.' . "\n";
    }
}

?>