I feel like i am slightly insane, and I have certainly read the docs on this. I am completely unable to echo out various objects in a JSON array in PHP. I am not sure what I'm doing wrong, but I'm ripping my hair out...
Here is my JSON array:
{
"photos": {
"page": 1,
"pages": 1569045,
"perpage": 1,
"total": "1569045",
"photo": [
{
"id": "14842817422",
"owner": "23432140#N06",
"secret": "c37cfa1914",
"server": "3864",
"farm": 4,
"title": "pizza",
"ispublic": 1,
"isfriend": 0,
"isfamily": 0
}
]
},
"stat": "ok"
}
I know this is simple, but I can't get it right. I would like to echo out four different values.
This is what I have been trying:
$photoId = $jsonDecoded['photos']['photo'][0]['id'];
$photoSecret = $jsonDecoded['photos']['photo'][0]['secret'];
$photoServer = $jsonDecoded['photos']['photo'][0]['server'];
$photoFarm = $jsonDecoded['photos']['photo'][0]['farm'];
I know this seems newbie. Please help...
Best,
The problem is that you have both objects and arrays in your json, but are using array syntax in your php.
There are two ways to fix this, 1st simply set the second parameter of json_decode to true:
json_decode($json, true);
This will create a multidimentional array you can access as suggested in your question, eg:
$photoId = $jsonDecoded['photos']['photo'][0]['id'];
Alertinitivly you can use object property syntax on your existing $jsonDecoded:
$photoId = $jsonDecoded->photos->photo[0]->id;
if there are multiple photo sub arrays then you can do like this.
//this will create array instead of object
$jsonDecoded = json_decode($your_feed_data,true);
foreach($jsonDecoded['photos']['photo'] as $sub_array){
$photoId = $sub_array['id'];
$photoSecret = $sub_array['secret'];
$photoServer = $sub_array['server'];
$photoFarm = $sub_array['farm'];
}
Related
I want to parse values from an Json API, but I cant get it to work
The API returns this JSON:
[
{
"assets": [
{
"id": 6,
"size": 1429504,
"download_count": 1,
"browser_download_url": "https://dl.domain.tld/files/cdbc6e19-cd86-4ed6-8897-37ec5aaee578"
}
]
}
]
I tried to get the ID value like this:
$json_obj = json_decode($resp);
print $json_obj->assets[0]->id;
but I get no result whereas it should be 6. What do I do wrong here?
Remember the outer part of the JSON is an array, as suggested by the opening [. So you need to first access the first (and only) element of it:
$json_obj[0]->assets[0]->id; //<-- note the first [0]
I think the correct answer is
$json_obj = json_decode($resp);
print $json_obj[0]->assets[0]->id;
The json object will be converted to a php array, since you have an array with a object inside in your case it will be a multidimentional array with the objects inside.
Try this its worked for me..
$json ='[
{
"assets": [
{
"id": 6,
"size": 1429504,
"download_count": 1,
"browser_download_url": "https://dl.domain.tld/files/cdbc6e19-cd86-4ed6-8897-37ec5aaee578"
}
]
}
]';
$json_obj = json_decode($json);
var_dump($json_obj[0]->assets[0]->id)
?>
decode JSON to the array and fetch the id by proper array keys
$jToArray = json_decode($resp, TRUE);
echo $jToArray[0]['assets'][0]['id'];//You will get the correct id
I have a JSON file that, in essence, is structured like this:
[{
"name": "James",
"reviews": [
{
"stars": 5,
"body": "great!"
},
{
"stars": 1,
"body": "bad!"
}
]
},
{
"name": "David",
"reviews": [
{
"stars": 4,
"body": "pretty good!"
},
{
"stars": 2,
"body": "just ok..."
}
]
}]
Now when positing new review data for David to a PHP script, how do I target David's specific "reviews" and append it?
I have already decoded everything correctly and have access to both the decoded file and post information. I just don't know how to target David's specific reviews in the JSON array... Thank you in advance!
UPDATE - Just to be clear, everything is decoded already, the POST data and the JSON file from the server. I just need to know how to target David's reviews specifically and append it.
UPDATE 2 - Everyone, please also understand that this is in the case that the index is not known. Doing [1] would be awesome, but when someone submits, they won't know what index it is. The loop for the rendering is being done in AngularJS btw, so can't assign anything on the PHP side for the front-end.
You will have to make use of a for-loop/foreach to iterate through the array testing where arr['name'] === 'David',
then you can access arr['reviews'].
foreach ($array as $person)
{
if ($person['name'] === 'David')
{
$person['reviews'][] = array("stars"=> 3,"body"=> "pretty cool!");
break;
}
}
Edit:
You could also make a generic function for this
function findElem(arr,field,e)
{
foreach ($arr as $elem)
{
if ($elem[field] === e)
{
return $elem;
}
}
return null;
}
to call:
$elem = findElem(myArray,'name','David');
if ($elem !== null)
$elem[] = array("stars"=> 3,"body"=> "pretty cool!");
Looks like more work, but if you are going to do it repeatedly then this helps.
PHP >= 5.5.0 needed for array_column or see below for an alternate:
$array[array_search('David', array_column($array, 'name'))]['reviews'][] = array(
'stars'=>1,'body'=>'meh'
);
Instead of array_column you can use:
array_map(function($v) { return $v['name']; }, $array);
If you want specifically david's reviews, and only david's reviews... assuming that $array holds the json_decoded array:
$david_reviews = $array[1]["reviews"];
foreach($david_reviews as $review){
//Do code to retrieve indexes of array
$stars = $review["stars"] //5
$body = $review["body"] //Great!
}
If you're looking to grab reviews for each result, then user2225171's answer is what you're looking for.
json_decode($json, true) will return you the simple array of data. Then save what you need and save back with json_encode()
I am trying to create a simple android application that takes data from a database and displays it in a list format on the android screen. I made a php script that queries the database and returns a json object. I convert the json object into json array and extract the relevant data for display. But I am getting this error "JSONException: type org.json.JSONObject cannot be converted to JSONArray".
Following is my php script -
// response Array
$response = array("tag" => $tag, "success" => 0, "error" => 0);
$username = $_POST['username'];
$events = $db->viewAttendingEvent($username);
if ($events) {
$response["success"] = 1;
$response["event"]["owner"] = $events["owner"];
$response["event"]["friendsnames"] = $events["friendsnames"];
$response["event"]["vote"] = $events["vote"];
$response["event"]["accepted"] = $events["accepted"];
$response["event"]["eventname"] = $events["eventname"];
$response["event"]["eventnumber"] = $events["eventnumber"];
$response["event"]["created_at"] = $events["created_at"];
echo json_encode($response);
This is the json which I receive back :
{
"tag": "view_invitations",
"success": 1,
"error": 0,
"event": {
"owner": "jkkkkoopp",
"friendsnames": "don",
"vote": "0",
"accepted": "f",
"eventname": "yyy",
"eventnumber": "11",
"created_at": "2014-05-29 22:27:31.843528"
}
}
I am trying to extract 'event' from this json object, which is not an array.
it should be
{
"event": [
{
"owner": "jkkkkoopp",
"friendsnames": "don",
"vote": "0",
"accepted": "f",
"eventname": "yyy",
"eventnumber": "11",
"created_at": "2014-05-2922: 27: 31.843528"
}
]
}
Can someone help me how to make this a valid jsonArray ? Thanks
If you're looking to get a JavaScript 'Array' (from which I mean an Object with nothing but integer keys) then you need to only have integer keys in your PHP Array.
This article is a pretty good resource and explains some of the differences between arrays and objects in javascript. The relevant quote here comes from the What Arrays Are section (emphasis mine):
Javascript arrays are a type of object used for storing multiple
values in a single variable. Each value gets numeric index and may be
any data type.
No it should not be what you proposed it should be. If that were the case you would have to have your php be this:
$response["event"][0]["owner"] = $events["owner"];
$response["event"][0]["friendsnames"] = $events["friendsnames"];
$response["event"][0]["vote"] = $events["vote"];
$response["event"][0]["accepted"] = $events["accepted"];
$response["event"][0]["eventname"] = $events["eventname"];
$response["event"][0]["eventnumber"] = $events["eventnumber"];
$response["event"][0]["created_at"] = $events["created_at"];
The way you have it now is event is an associative array so it converts it to an object. You are expecting that event = an array of objects. So you need to either change your php code to make event be an array of objects (as demonstrated above) or you need to modify your expectations to have event = an object.
I'm trying to pull the price from the following JSON but can't seem to figure out how to reference the actual values:
{"cards": [ { "high": "0.73", "volume": 1, "percent_change": "-2.67", "name": "Lightning Bolt", "url": "http://blacklotusproject.com/cards/Revised+Edition/Lightning+Bolt/", "price": "0.73", "set_code": "3ED", "average": "0.73", "change": "-0.02", "low": "0.73"}], "currency": "USD" }
So far I've got this code, which gets into the cards array but I'm unsure how to get farther - every attempt I've tried returns null.
$json = file_get_contents($url); $data = json_decode($json, TRUE);
echo var_dump($data[cards]);
Can someone shed light on what I need to do?
$data['cards'] has another array within it. You will need to access this array with index 0. For instance, $data['cards'][0]['high'] and so on.
$data['cards'] is an array itself, so you could do:
foreach ($data['cards'] AS $carditem) {
echo $carditem['high'];
...
}
to get all items in that array,
or if you only want the first item $data['cards'][0]['...']
To access using a string literal array index, always use quotes.
$data["cards"]
Link: PHP Documentation for Arrays
I'm trying to get into just data from
{
"data": [{
"media_count": 3045,
"name": "snow",
},
{
"media_count": 79,
"name": "snowman",
},
{
"media_count": 40,
"name": "snowday",
},
{
"media_count": 29,
"name": "snowy",
}]
}
I've been trying, using:
$obj = json_decode($res[0], true);
echo $obj['data']; //this returns an array
I also tried this:
$obj = json_encode($res[0], true);
echo $obj; // this returns json, but not inside `data`
"data": [{
"media_count":54373,
"name":"test"
}]
I just want to get inside data. How would I do so?
Thanks in advance!
UPDATE: Sorry to mention, I would like this in json format please
eventually, I would like to only see
{
"media_count":54373,
"name":"test"
}
Something like thiat
Use json_encode() to get what you want:
$obj = json_decode($res[0], true);
echo json_encode($obj['data']);
In your first example, $obj['data'] returns an array because that's how the JSON is set up. According to the JSON, data is a collection of elements.
To access within the array, you can do this:
foreach($obj['data'] as $object) {
print_r($object);
}
You can also index into it as you want:
print_r($obj['data'][0]);
EDIT
If I'm getting you correct, you want to convert the first JSON to this:
"data": [{
"media_count":54373,
"name":"test"
}]
If so, that is not possible since the second fragment is not valid JSON. (use http://jsonlint.com)
firstly access the data item of the json array;
$obj1=$obj[item];
$sizeobj=sizeof($obj1);
for($i=0;$i<$sizeobj;$i++)
{
// your code to access the data items
// for eg $obj[item][$i][media_count}
}