我试图从嵌套的JSON中获取一些值，但是由于某些原因，我没有获取键的值。这是我的JSON
$data =
{
"currency":"USD",
"results":[
{
"itineraries":[
{
"outbound":{
"duration":"07:10",
"flights":[
{
"departs_at":"2018-09-25T22:50",
"arrives_at":"2018-09-26T11:00",
"origin":{
"airport":"EWR"
},
"destination":{
"airport":"STN"
},
"marketing_airline":"H1",
"operating_airline":"PF",
"flight_number":"1930",
"aircraft":"32S",
"booking_info":{
"travel_class":"ECONOMY",
"booking_code":"T",
"seats_remaining":9
}
}
]
},
"inbound":{
"duration":"08:25",
"flights":[
{
"departs_at":"2018-09-27T17:55",
"arrives_at":"2018-09-27T21:20",
"origin":{
"airport":"STN"
},
"destination":{
"airport":"EWR"
},
"marketing_airline":"H1",
"operating_airline":"PF",
"flight_number":"1929",
"aircraft":"32S",
"booking_info":{
"travel_class":"ECONOMY",
"booking_code":"T",
"seats_remaining":9
}
}
]
}
}
],
"fare":{
"total_price":"538.39",
"price_per_adult":{
"total_fare":"538.39",
"tax":"237.39"
},
"restrictions":{
"refundable":false,
"change_penalties":true
}
}
},
{
"itineraries":[
{
"outbound":{
"duration":"10:30",
"flights":[
{
"departs_at":"2018-09-25T18:55",
"arrives_at":"2018-09-26T04:55",
"origin":{
"airport":"EWR",
"terminal":"B"
},
"destination":{
"airport":"KEF"
},
"marketing_airline":"WW",
"operating_airline":"WW",
"flight_number":"104",
"aircraft":"321",
"booking_info":{
"travel_class":"ECONOMY",
"booking_code":"X",
"seats_remaining":8
}
},
{
"departs_at":"2018-09-26T06:10",
"arrives_at":"2018-09-26T10:25",
"origin":{
"airport":"KEF"
},
"destination":{
"airport":"LGW",
"terminal":"S"
},
"marketing_airline":"WW",
"operating_airline":"WW",
"flight_number":"810",
"aircraft":"321",
"booking_info":{
"travel_class":"ECONOMY",
"booking_code":"X",
"seats_remaining":9
}
}
]
},
"inbound":{
"duration":"11:05",
"flights":[
{
"departs_at":"2018-09-27T17:20",
"arrives_at":"2018-09-27T19:30",
"origin":{
"airport":"STN"
},
"destination":{
"airport":"KEF"
},
"marketing_airline":"WW",
"operating_airline":"WW",
"flight_number":"827",
"aircraft":"321",
"booking_info":{
"travel_class":"ECONOMY",
"booking_code":"E",
"seats_remaining":9
}
},
{
"departs_at":"2018-09-27T21:10",
"arrives_at":"2018-09-27T23:25",
"origin":{
"airport":"KEF"
},
"destination":{
"airport":"JFK",
"terminal":"1"
},
"marketing_airline":"WW",
"operating_airline":"WW",
"flight_number":"109",
"aircraft":"321",
"booking_info":{
"travel_class":"ECONOMY",
"booking_code":"E",
"seats_remaining":9
}
}
]
}
}
],
"fare":{
"total_price":"544.61",
"price_per_adult":{
"total_fare":"544.61",
"tax":"353.61"
},
"restrictions":{
"refundable":false,
"change_penalties":true
}
}
}
]
}
我正在尝试遍历JSON并从像这样的一些键中获取值
$arr = json_decode($data,true);
foreach($arr['results'] as $data) {
echo "duration: ".$data['itineraries']['outbound']['duration'].PHP_EOL.
"origin: ".$data['itineraries']['outbound']['flights']['origin'].PHP_EOL; //etc
}
但是，我在执行它时没有遇到任何错误，但是我也没有从键中获取值。 我正在尝试获取持续时间和原始密钥的值。知道我在做什么错吗？
刚发现我的错误。我忘记了[0]。这样就解决了。
foreach($arr['results'] as $data) {
echo "duration: ".$data['itineraries'][0]['outbound']['duration'].PHP_EOL.
"origin: ".$data['itineraries'][0]['outbound']['flights'][0]['origin']['airport'].PHP_EOL; //etc
}
答案 0 :(得分：1)
某些已解析的元素在数组内。因此，您必须在某些位置添加[0]。 这将起作用：
foreach ($arr['results'] as $data) {
echo "duration: " . $data['itineraries'][0]['outbound']['duration'] . PHP_EOL .
"origin: " . $data['itineraries'][0]['outbound']['flights'][0]['origin']['airport'] . PHP_EOL; //etc
}
输出：
duration: 07:10 origin: EWR duration: 10:30 origin: EWR