Question

你能给我一些如何从这个文件中获取数据的建议吗？

我需要接收一个停靠点和行列表，或者来自最嵌套对象的其他数据，但我现在不知道如何使用JSON中的嵌套对象。

{
    "stops": {
        "11": "Winna-Karpacka",
        "21": "Piwna",
        "31": "RondoTysiąclecia",
        "41": "Piątkowicka-Wiączyńska",
        "51": "Taczańska",
        "61": "Komarzewska",
        "12": "Winna-Działki",
        "22": "Piwna-Karpacka",
        "32": "RondoTysiąclecia",
        "42": "Piątkowicka",
        "52": "Taczańska",
        "62": "Komarzewska-Wiączyńska"
    },
    "lines": {
        "1": {
            "variants": {
                "16": [{
                    "11": 0
                }, {
                    "21": 3
                }, {
                    "31": 5
                }, {
                    "41": 10
                }, {
                    "51": 12
                }, {
                    "61": 16
                }],
                "61": [{
                    "62": 0
                }, {
                    "52": 3
                }, {
                    "42": 6
                }, {
                    "32": 8
                }, {
                    "22": 14
                }, {
                    "12": 16
                }]
            },
            "departures": {
                "16": [
                    "04:00",
                    "04:50",
                    "05:40",
                    "06:30",
                    "07:20",
                    "08:10",
                    "09:00",
                    "10:00",
                    "11:00",
                    "12:00",
                    "13:00",
                    "14:00",
                    "14:50",
                    "15:40",
                    "16:30",
                    "17:20",
                    "18:10",
                    "19:00",
                    "20:00",
                    "21:00",
                    "22:00"
                ],
                "61": [
                    "04:25",
                    "05:15",
                    "06:05",
                    "06:55",
                    "07:45",
                    "08:35",
                    "09:30",
                    "10:30",
                    "11:30",
                    "12:30",
                    "13:30",
                    "14:25",
                    "15:15",
                    "16:05",
                    "16:55",
                    "17:45",
                    "18:35",
                    "19:30",
                    "20:30",
                    "21:30"
                ]
            }
        },
        "2": {
            "variants": {
                "25": [{
                    "21": 0
                }, {
                    "31": 2
                }, {
                    "41": 7
                }, {
                    "51": 9
                }],
                "52": [{
                    "52": 0
                }, {
                    "42": 3
                }, {
                    "32": 5
                }, {
                    "22": 11
                }]
            },
            "departures": {
                "25": [
                    "10:15",
                    "10:45",
                    "11:15",
                    "11:45",
                    "12:15",
                    "12:45",
                    "13:15",
                    "13:45",
                    "14:15",
                    "14:45",
                    "15:15",
                    "15:45",
                    "16:15",
                    "16:45",
                    "17:15",
                    "17:45"

                ],
                "52": [
                    "10:30",
                    "11:00",
                    "11:30",
                    "12:00",
                    "12:30",
                    "13:00",
                    "13:30",
                    "14:00",
                    "14:30",
                    "15:00",
                    "15:30",
                    "16:00",
                    "16:30",
                    "17:00",
                    "17:30"
                ]
            }
        },
        "3": {
            "variants": {
                "35": [{
                    "31": 0
                }, {
                    "41": 12
                }, {
                    "51": 22
                }],
                "53": [{
                    "51": 0
                }, {
                    "41": 10
                }, {
                    "31": 22
                }]
            },
            "departures": {
                "34": [
                    "01:10",
                    "02:10",
                    "03:10"
                ],
                "43": [
                    "01:40",
                    "02:40",
                    "03:40"
                ]
            }
        }
    }
}

我尝试过类似的东西，但它不起作用

$str = file_get_contents('dane.json');
$json = json_decode($str, true);
echo $json['stops']['11'];

Answer 1

json_decode，然后使用我编写的这个函数生成适当的PHP代码来访问JSON中的任何特定元素。

function jsonGeneratePhp($json, $phpString = '$json') {
    if (is_array($json)) {
        echo "$phpString<br>";
        foreach ($json as $key => $value) {
            jsonGeneratePhp($value, "{$phpString}['$key']");
        }
    } elseif (is_object($json)) {
        echo "$phpString<br>";
        foreach ($json as $key => $value) {
            if (is_numeric($key)) {
                jsonGeneratePhp($value, "{$phpString}->{{$key}}");
            } else {
                jsonGeneratePhp($value, "{$phpString}->$key");
            }
        }
    } else {
        echo "$phpString = $json<br>";
    }
}

$str = file_get_contents('dane.json');
$json = json_decode($str);
jsonGeneratePhp($json);

这将生成一堆与每条JSON数据相对应的PHP语句，如下所示：

$json
$json->stops
$json->stops->{11} = Winna-Karpacka
$json->stops->{21} = Piwna
...

以= something结尾的任何内容都是值。

例如：echo $json->stops->{11}; // Winna-Karpacka
以= something结尾的任何内容都是您可以使用foreach进行迭代的数组或对象。

例如：foreach ($json->stops as $stopId => $stopName) { ... }

如何使用php从json中的嵌套对象获取数据

1 个答案: