我正在开展一个小项目，要求英国国家铁路公司提供数据。我有这个部分工作，返回的数据是一个对象。如何将数据对象转换为数组，并能够访问该数组的选定部分。
我的数据对象如下：
stdClass Object
(
[GetStationBoardResult] => stdClass Object
(
[generatedAt] => 2018-01-22T16:08:03.2671614+00:00
[locationName] => London Paddington
[crs] => PAD
[nrccMessages] => stdClass Object
(
[message] => stdClass Object
(
[_] => <P>Trains at Oxford may be cancelled, delayed or revised. More information can be found in <A href="http://nationalrail.co.uk/service_disruptions/182185.aspx">Latest Travel News</A></P>
)
)
[platformAvailable] => 1
[trainServices] => stdClass Object
(
[service] => stdClass Object
(
[std] => 15:45
[etd] => Delayed
[operator] => Great Western Railway
[operatorCode] => GW
[serviceType] => train
[delayReason] => This train has been delayed by a shortage of train drivers
[serviceID] => U1uclHPAaZ+YyHhPMfca1A==
[rsid] => GW611100
[origin] => stdClass Object
(
[location] => stdClass Object
(
[locationName] => London Paddington
[crs] => PAD
)
)
[destination] => stdClass Object
(
[location] => stdClass Object
(
[locationName] => Swansea
[crs] => SWA
)
)
)
)
)
)
Var Dump。
array(1) {
["GetStationBoardResult"]=>
object(stdClass)#6 (6) {
["generatedAt"]=>
string(33) "2018-01-22T15:56:58.6642415+00:00"
["locationName"]=>
string(17) "London Paddington"
["crs"]=>
string(3) "PAD"
["nrccMessages"]=>
object(stdClass)#7 (1) {
["message"]=>
object(stdClass)#8 (1) {
["_"]=>
string(185) "<P>Trains at Oxford may be cancelled, delayed or revised. More information can be found in <A href="http://nationalrail.co.uk/service_disruptions/182185.aspx">Latest Travel News</A></P>"
}
}
["platformAvailable"]=>
bool(true)
["trainServices"]=>
object(stdClass)#9 (1) {
["service"]=>
object(stdClass)#10 (10) {
["std"]=>
string(5) "15:45"
["etd"]=>
string(7) "Delayed"
["operator"]=>
string(21) "Great Western Railway"
["operatorCode"]=>
string(2) "GW"
["serviceType"]=>
string(5) "train"
["delayReason"]=>
string(58) "This train has been delayed by a shortage of train drivers"
["serviceID"]=>
string(24) "U1uclHPAaZ+YyHhPMfca1A=="
["rsid"]=>
string(8) "GW611100"
["origin"]=>
object(stdClass)#11 (1) {
["location"]=>
object(stdClass)#12 (2) {
["locationName"]=>
string(17) "London Paddington"
["crs"]=>
string(3) "PAD"
}
}
["destination"]=>
object(stdClass)#13 (1) {
["location"]=>
object(stdClass)#14 (2) {
["locationName"]=>
string(7) "Swansea"
["crs"]=>
string(3) "SWA"
}
}
}
}
}
}
任何人都可以告诉我如何做到这一点。 非常感谢你的时间。
RAW DATA有3条记录
object(stdClass)#5 (1) {
["GetStationBoardResult"]=>
object(stdClass)#6 (5) {
["generatedAt"]=>
string(33) "2018-01-23T12:35:38.6358435+00:00"
["locationName"]=>
string(17) "London Paddington"
["crs"]=>
string(3) "PAD"
["platformAvailable"]=>
bool(true)
["trainServices"]=>
object(stdClass)#7 (1) {
["service"]=>
array(3) {
[0]=>
object(stdClass)#8 (9) {
["std"]=>
string(5) "12:33"
["etd"]=>
string(5) "12:35"
["operator"]=>
string(16) "Heathrow Connect"
["operatorCode"]=>
string(2) "HC"
["serviceType"]=>
string(5) "train"
["serviceID"]=>
string(24) "rnsoBNmZejPq0MYoqh4RrA=="
["rsid"]=>
string(8) "HC010500"
["origin"]=>
object(stdClass)#9 (1) {
["location"]=>
object(stdClass)#10 (2) {
["locationName"]=>
string(17) "London Paddington"
["crs"]=>
string(3) "PAD"
}
}
["destination"]=>
object(stdClass)#11 (1) {
["location"]=>
object(stdClass)#12 (2) {
["locationName"]=>
string(21) "Heathrow Airport T123"
["crs"]=>
string(3) "HXX"
}
}
}
[1]=>
object(stdClass)#13 (10) {
["std"]=>
string(5) "12:40"
["etd"]=>
string(7) "On time"
["platform"]=>
string(2) "12"
["operator"]=>
string(16) "Heathrow Express"
["operatorCode"]=>
string(2) "HX"
["serviceType"]=>
string(5) "train"
["serviceID"]=>
string(24) "Ti/5lChQ5BZgVT/8gmULBA=="
["rsid"]=>
string(8) "HX010000"
["origin"]=>
object(stdClass)#14 (1) {
["location"]=>
object(stdClass)#15 (2) {
["locationName"]=>
string(17) "London Paddington"
["crs"]=>
string(3) "PAD"
}
}
["destination"]=>
object(stdClass)#16 (1) {
["location"]=>
object(stdClass)#17 (2) {
["locationName"]=>
string(19) "Heathrow Airport T5"
["crs"]=>
string(3) "HWV"
}
}
}
[2]=>
object(stdClass)#18 (10) {
["std"]=>
string(5) "12:42"
["etd"]=>
string(7) "On time"
["platform"]=>
string(2) "14"
["operator"]=>
string(21) "Great Western Railway"
["operatorCode"]=>
string(2) "GW"
["serviceType"]=>
string(5) "train"
["serviceID"]=>
string(24) "H+VXbe2oimkbSMAGgS4vBQ=="
["rsid"]=>
string(8) "GW756600"
["origin"]=>
object(stdClass)#19 (1) {
["location"]=>
object(stdClass)#20 (2) {
["locationName"]=>
string(17) "London Paddington"
["crs"]=>
string(3) "PAD"
}
}
["destination"]=>
object(stdClass)#21 (1) {
["location"]=>
object(stdClass)#22 (2) {
["locationName"]=>
string(7) "Twyford"
["crs"]=>
string(3) "TWY"
}
}
}
}
}
}
}
嗨RamRaider，我有一个最后的问题。 当＆＃34;服务＆＃34; array包含沿着路径的站点呼叫点的数据如何读取每个位置的变量。
我尝试根据您的示例使用以下代码，但无论出于何种原因我都无法访问变量。
if( is_array( $callingAt ) ){
/* Multiple records */
/* an array of objects */
foreach( $callingAt as $index => $obj ){
$keys=array_keys( get_object_vars( $obj ) );
//print_r ($keys);
foreach( $keys as $key ){
${$key}=$obj->$key;
//print_r (${$key});
printf("<pre>\nStation: %s\n</pre>\n", $locationName->subsequentCallingPoints->callingPointList->callingPoint );
}
}
}
Code with the calling points
stdClass Object (
[GetStationBoardResult] => stdClass Object (
[generatedAt] => 2018-01-26T10:34:47.9177301+00:00
[locationName] => London Euston
[crs] => EUS
[platformAvailable] => 1
[trainServices] => stdClass Object (
[service] => Array (
[0] => stdClass Object (
[std] => 10:34
[etd] => On time
[platform] => 11
[operator] => West Midlands Trains
[operatorCode] => LM
[serviceType] => train
[serviceID] => JsXOPFy5xbo8LmsvGLTj8Q==
[rsid] => LM318200
[origin] => stdClass Object (
[location] => stdClass Object (
[locationName] => London Euston
[crs] => EUS
)
)
[destination] => stdClass Object (
[location] => stdClass Object (
[locationName] => Tring
[crs] => TRI
)
)
[subsequentCallingPoints] => stdClass Object (
[callingPointList] => stdClass Object (
[callingPoint] => Array (
[0] => stdClass Object (
[locationName] => Harrow & Wealdstone
[crs] => HRW
[st] => 10:46
[et] => On time
)
[1] => stdClass Object (
[locationName] => Bushey
[crs] => BSH
[st] => 10:51
[et] => On time
)
)
[serviceType] => train
[serviceChangeRequired] =>
[assocIsCancelled] =>
)
)
)
答案 0 :(得分：1)
为了演示如何访问数据的组成部分，我重新创建了这样的对象数据。据推测，这是来自铁路API的json字符串，您已将其解码为对象。
$data=(object)array(
'GetStationBoardResult'=>(object)array(
'generatedAt' => '2018-01-22T16:08:03.2671614+00:00',
'locationName' => 'London Paddington',
'crs' => 'PAD',
'nrccMessages' => (object)array(
'message' => (object)array(
'_' => '<P>Trains at Oxford may be cancelled, delayed or revised. More information can be found in <A href="http://nationalrail.co.uk/service_disruptions/182185.aspx">Latest Travel News</A></P>'
)
),
'platformAvailable' => 1,
'trainServices' => (object)array(
'service' => array(
(object)array(
'std' => '15:45',
'etd' => 'Delayed',
'operator' => 'Great Western Railway',
'operatorCode' => 'GW',
'serviceType' => 'train',
'delayReason' => 'This train has been delayed by a shortage of train drivers',
'serviceID' => 'U1uclHPAaZ+YyHhPMfca1A==',
'rsid' => 'GW611100',
'origin' => (object)array(
'location' => (object)array(
'locationName' => 'London Paddington',
'crs' => 'PAD'
)
),
'destination' => (object)array(
'location' => (object)array(
'locationName' => 'Swansea',
'crs' => 'SWA'
)
)
),
(object)array(
'std' => '12:25',
'etd' => 'On time',
'operator' => 'Heathrow Express',
'operatorCode' => 'HX',
'serviceType' => 'train',
'delayReason' => 'This train is unusual - it is not late',
'serviceID' => 'voGWZn1GnW5o3TnqXptUXg',
'rsid' => 'HX010000',
'origin' => (object)array(
'location' => (object)array(
'locationName' => 'London Paddington',
'crs' => 'PAD'
)
),
'destination' => (object)array(
'location' => (object)array(
'locationName' => 'Heathrow Airport T5',
'crs' => 'HWV'
)
)
)
)
)
)
);
/* Get reference to the parent node in data structure */
$results=$data->GetStationBoardResult;
/*
The direct child elements of the parent
are easily accessible using object notation
*/
$generatedAt=$results->generatedAt;
$locationName=$results->locationName;
$crs=$results->crs;
$message=$results->nrccMessages->message->{'_'}; /* looks like a smiley face ~ not sure that's possible on British trains! */
$platform=$results->platformAvailable;
/* The services... */
$service=$results->trainServices->service;
if( is_array( $service ) ){
/* Multiple records */
/* an array of objects */
foreach( $service as $index => $obj ){
$keys=array_keys( get_object_vars( $obj ) );
foreach( $keys as $key ){
${$key}=$obj->$key;
}
printf("<pre>Time: %s\nOperator: %s\nServiceID: %s</pre>", $std, $operator, $serviceID );
}
} else {
/* Single record */
/* if we get the keys we can loop through them */
$keys=array_keys( get_object_vars( $service ) );
foreach( $keys as $key ){
/*
You could generate variable variables from the data at this point
which would allow you to access them as variables such as
$delayReason or $std etc ( vars named the same as the keys )
*/
${$key}=$service->$key;
/*
or
printf('<p>%s: %s</p>', $key, $service->$key ); etc
*/
}
/*
The services have `origin` and `destination`
so you can access these like this
( assuming variable variables as above )
*/
$origin_location=$origin->location->locationName;
$origin_crs=$origin->location->crs;
/* and */
$dest_location=$destination->location->locationName;
$dest_crs=$destination->location->crs;
/* Or, without variable variables... */
$dest_location=$service->destination->location->locationName;
}
对于调用点，如果我正确地重新构建了结构，那么就像这样：
$subsequentCallingPoints=$results->subsequentCallingPoints;
$callingPointList=$subsequentCallingPoints->callingPointList;
$callingPoint=$callingPointList->callingPoint;
/* or */
$callingPoint=$results->subsequentCallingPoints->callingPointList->callingPoint;
foreach( $callingPoint as $obj ){
$locationName=$obj->locationName;
$crs=$obj->crs;
printf('callingPoint -> $locationName=%s, $crs=%s<br />', $locationName, $crs );
}