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php - 在 PHP 中解析“嵌套”数组

问题描述

我正在像这样返回 JSON 数据：

{
"destination_addresses": [
    "67-89 Pacific St, Brooklyn, NY 11201, USA"
],
"origin_addresses": [
    "566 Vermont St, Brooklyn, NY 11207, USA"
],
"rows": [
    {
        "elements": [
            {
                "distance": {
                    "text": "6.5 mi",
                    "value": 10423
                },
                "duration": {
                    "text": "35 mins",
                    "value": 2076
                },
                "status": "OK"
            }
        ]
    }
],
"status": "OK"

}

我需要将距离值和持续时间值作为变量。

所以，我知道我需要解码这个 JSON：

$distance_data = json_decode($output);

而且我尝试了很多变化，例如：

$duration_value = $distance_data['rows']['elements']['duration']['value']);

但我知道这是不对的。有人可以指出我正确的方向吗？

标签： phparrays

解决方案

你得到了对象和数组的混合。这是您的示例的完整示例。

// Your JSON response.
$json = '{
"destination_addresses": [
    "67-89 Pacific St, Brooklyn, NY 11201, USA"
],
"origin_addresses": [
    "566 Vermont St, Brooklyn, NY 11207, USA"
],
"rows": [
    {
        "elements": [
            {
                "distance": {
                    "text": "6.5 mi",
                    "value": 10423
                },
                "duration": {
                    "text": "35 mins",
                    "value": 2076
                },
                "status": "OK"
            }
        ]
    }
],
"status": "OK"
}';

// Get JSON Object
$obj = json_decode($json);

// Let's see what's in the object.
print_r($obj);

/*
stdClass Object
(
    [destination_addresses] => Array
        (
            [0] => 67-89 Pacific St, Brooklyn, NY 11201, USA
        )

    [origin_addresses] => Array
        (
            [0] => 566 Vermont St, Brooklyn, NY 11207, USA
        )

    [rows] => Array
        (
            [0] => stdClass Object
                (
                    [elements] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [distance] => stdClass Object
                                        (
                                            [text] => 6.5 mi
                                            [value] => 10423
                                        )

                                    [duration] => stdClass Object
                                        (
                                            [text] => 35 mins
                                            [value] => 2076
                                        )

                                    [status] => OK
                                )

                        )

                )

        )

    [status] => OK
)
*/

// Let's pull the value we want using the information above.
// Notice we start with an object, then rows is an array of objects, as is elements.
echo $obj -> rows[0] -> elements[0] -> duration -> value;

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