使用php来拉动＆＃39;列＆＃39; json数据

Question

我正试图从这个json中提取特定数据：

[
    {
        "@context": "http://vocab.tokyometroapp.jp/context_odpt_Railway.jsonld",
        "@id": "urn:ucode:_00001C000000000000010000030C46B1",
        "@type": "odpt:Railway",
        "owl:sameAs": "odpt.Railway:TokyoMetro.Yurakucho",
        "dc:title": "有楽町",
        "odpt:stationOrder": [
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Wakoshi",
                "odpt:index": 0
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.ChikatetsuNarimasu",
                "odpt:index": 1
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.ChikatetsuAkatsuka",
                "odpt:index": 2
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Heiwadai",
                "odpt:index": 3
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Hikawadai",
                "odpt:index": 4
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.KotakeMukaihara",
                "odpt:index": 5
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Senkawa",
                "odpt:index": 6
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Kanamecho",
                "odpt:index": 7
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Ikebukuro",
                "odpt:index": 8
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.HigashiIkebukuro",
                "odpt:index": 9
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Gokokuji",
                "odpt:index": 10
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Edogawabashi",
                "odpt:index": 11
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Iidabashi",
                "odpt:index": 12
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Ichigaya",
                "odpt:index": 13
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Kojimachi",
                "odpt:index": 14
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Nagatacho",
                "odpt:index": 15
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Sakuradamon",
                "odpt:index": 16
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Yurakucho",
                "odpt:index": 17
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.GinzaItchome",
                "odpt:index": 18
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Shintomicho",
                "odpt:index": 19
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Tsukishima",
                "odpt:index": 20
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Toyosu",
                "odpt:index": 21
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.Tatsumi",
                "odpt:index": 22
            },
            {
                "odpt:station": "odpt.Station:TokyoMetro.Yurakucho.ShinKiba",
                "odpt:index": 23
            }
        ],
        "odpt:travelTime": 

~~~~~~~~~~~~~~~~~~~~~snip~~~~~~~~~~~~~~~~~~

我想要获得的是电台名称，例如TokyoMetro.Yurakucho.ShinKiba。

我试过了：

$json = file_get_contents($url.$info.$token);
$data = json_decode($json);
$stations = array($data->opdt.station);
var_dump($stations);

但我没有得到任何回报：

array(1) { [0]=> string(7) "station" }

有没有办法抓住这个特定的“列”数据？我更习惯于数据库查询。

非常感谢！

Answer 1

由于有多个工作站，您必须遍历数组并将它们放在工作站名称数组中。

$json = file_get_contents($url.$info.$token);
$data = json_decode($json, true);
$stations = array();
foreach ($data[0]['odpt:stationOrder'] as $station) {
    $name = $station['odpt:station'];
    $parts = explode(':', $name);
    $stations[] = $parts[1]; // Only care about the part after `odpt.Station:`
}

var_dump($stations);