Question

我有这个JSON数组数据：

[{"region":"Abersee","price":"1.298"},{"region":"Fuschl am See","price":"1.319"},{"region":"St. Gilgen","price":"1.317"},{"region":"Innerschwand","price":"1.321"},{"region":"Mondsee","price":"1.309"},{"region":"Abersee","price":"1.298"},{"region":"Mondsee","price":"1.309"},{"region":"Innerschwand","price":"1.321"},{"region":"Fuschl am See","price":"1.319"},{"region":"St. Gilgen","price":"1.317"},{"region":"Abersee","price":"1.298"},{"region":"Mondsee","price":"1.309"},{"region":"St. Gilgen","price":"1.317"},{"region":"Fuschl am See","price":"1.319"},{"region":"Innerschwand","price":"1.321"},{"region":"Abersee","price":"1.298"},{"region":"St. Gilgen","price":"1.317"},{"region":"Mondsee","price":"1.309"},{"region":"Fuschl am See","price":"1.319"},{"region":"Innerschwand","price":"1.321"},{"region":"Abersee","price":"1.298"},{"region":"Mondsee","price":"1.309"},{"region":"Fuschl am See","price":"1.319"},{"region":"St. Gilgen","price":"1.317"},{"region":"Innerschwand","price":"1.321"},{"region":"Abersee","price":"1.298"},{"region":"Fuschl am See","price":"1.319"},{"region":"Mondsee","price":"1.309"},{"region":"St. Gilgen","price":"1.317"},{"region":"Innerschwand","price":"1.321"}]

我不确定如何正确获取region和price数据。我试过这个：

$array = json_encode($jsondata);
$json = json_decode($array, true);
echo $json['region'];
echo $json['price'];

但没有出现。有什么建议吗？

Answer 1

试试这个：

$array = json_encode($jsondata);
$json = json_decode($array, true);

foreach($json as $data){
    echo $data['region'] . "<br>";
    echo $data['price'] . "<br>";
}

Answer 2

正如您所说，json_encode不是必需的 - 您已经拥有该JSON数据。只需解码它，然后循环它。您当前正在尝试访问第一个条目，但是从JSON到PHP的转换会将数字索引/数组键添加到JSON中不存在的PHP数组中。

数组上的

foreach：

$jsondata = '[{"region":"Abersee","price":"1.298"},{"region":"Fuschl am See","price":"1.319"},{"region":"St. Gilgen","price":"1.317"},{"region":"Innerschwand","price":"1.321"},{"region":"Mondsee","price":"1.309"},{"region":"Abersee","price":"1.298"},{"region":"Mondsee","price":"1.309"},{"region":"Innerschwand","price":"1.321"},{"region":"Fuschl am See","price":"1.319"},{"region":"St. Gilgen","price":"1.317"},{"region":"Abersee","price":"1.298"},{"region":"Mondsee","price":"1.309"},{"region":"St. Gilgen","price":"1.317"},{"region":"Fuschl am See","price":"1.319"},{"region":"Innerschwand","price":"1.321"},{"region":"Abersee","price":"1.298"},{"region":"St. Gilgen","price":"1.317"},{"region":"Mondsee","price":"1.309"},{"region":"Fuschl am See","price":"1.319"},{"region":"Innerschwand","price":"1.321"},{"region":"Abersee","price":"1.298"},{"region":"Mondsee","price":"1.309"},{"region":"Fuschl am See","price":"1.319"},{"region":"St. Gilgen","price":"1.317"},{"region":"Innerschwand","price":"1.321"},{"region":"Abersee","price":"1.298"},{"region":"Fuschl am See","price":"1.319"},{"region":"Mondsee","price":"1.309"},{"region":"St. Gilgen","price":"1.317"},{"region":"Innerschwand","price":"1.321"}]';

$json = json_decode($jsondata, true);

foreach($json as $each)
    echo $each['region'] . ': ' . $each['price'] . PHP_EOL;

Example

编辑：已解码数组的print_r（如Marcin Orlowski所述）会在PHP中显示其结构，类似于：

Array
(
    [0] => Array
        (
            [region] => Abersee
            [price] => 1.298
        )

    [1] => Array
        (
            [region] => Fuschl am See
            [price] => 1.319
        )

从JSON数组中获取数据

2 个答案: