Modify JSON Feed With php - php

Question

I have a JSON Feed which is accessed by an api.
The json feed it returns is as below:
[
{
"isoDate":"2017-09-15T00:00:00.0000000",
"events":[
{
"id":"-7317",
"name":"Exhibition SKMU: The collection 2015-2017",
},
{
"id":"-91417",
"name":"Torget - a multi cultural meeting place in Geilo",
}
]
},
{
"isoDate":"2017-09-16T00:00:00.0000000",
"events":[
{
"id":"-7317",
"name":"Exhibition SKMU: The collection 2015-2017",
},
{
"id":"-91417",
"name":"Torget - a multi cultural meeting place in Geilo",
}
]
}
]
I need the isoDate to be listed with each event instead of individually.
e.g.
[
{
"events":[
{
"isoDate":"2017-09-15T00:00:00.0000000",
"id":"-7317",
"name":"Exhibition SKMU: The collection 2015-2017",
},
{
"isoDate":"2017-09-15T00:00:00.0000000",
"id":"-91417",
"name":"Torget - a multi cultural meeting place in Geilo",
}
]
},
{
"events":[
{
"isoDate":"2017-09-16T00:00:00.0000000",
"id":"-7317",
"name":"Exhibition SKMU: The collection 2015-2017",
},
{
"isoDate":"2017-09-16T00:00:00.0000000",
"id":"-91417",
"name":"Torget - a multi cultural meeting place in Geilo",
}
]
}
]
Can this be achieved with php? Basically fetch that feed from a url and then display it in my preferred format?

Answer 1

So this is what you have to do, to get back your desired format of the json,
$json is your json string:
$eventList = json_decode($json);
foreach($eventList as $eventEntry){
$isoDate = $eventEntry->isoDate;
foreach($eventEntry->events as $subEventEntry){
$subEventEntry->isoDate = $isoDate;
}
//delete the isoDate from outer
unset($eventEntry->isoDate);
}
echo json_encode($eventList);
So basically, you are first decoding your json into php structure, apply your changes and after that, encode it back. Note here, that I have not appened true as second parameter for the $json_decode, but working with the resulting object.
Also: Your json is not standard comform and could result in errors. PHP will properly not decode it, because your object end with a comma. The last element of an object should be without comma. Instead of
{
"id":"-91417",
"name":"Torget - a multi cultural meeting place in Geilo",
}
make it like this:
{
"id":"-91417",
"name":"Torget - a multi cultural meeting place in Geilo"
}
I know, this can be a problem, when you get it from an API, but this is another problem of itself...
EDIT:
To get every "events" into one big array, you have to store them just like your imagination ;) . Think it like this: $subEventEntry holds one "events"-object. Because you are iterating both levels, you see everyone object of them. My suggestion would be to store them in a new array, and recreating the structure around it:
$everything = new stdClass();
$everything->events = array();
and then, in the inner loop:
foreach($eventList as $eventEntry){
$isoDate = $eventEntry->isoDate;
foreach($eventEntry->events as $subEventEntry){
$subEventEntry->isoDate = $isoDate;
$everything->events[] = $subEventEntry; // <-- this has to be added
}
//delete the isoDate from outer
unset($eventEntry->isoDate);
}
When recreating the structure, and you don't need the old structure anymore you could remove the unset.
Just remeber every [ ] pair in the json represents an array, every { } pair an object (stdClass). The name of this object/array is referenced -> by its class property in the superobject.

Answer 2

Yes you can using json_decode() function for example:
$yourjson;/* your json */
$events = json_decode($yourjson, true);
foreach($events as $event){
echo $event["isoDate"];
}

Answer 3

You can use json_decode to decode the json object to php array then modify the array and encode it using json_encode