I am a beginner in php rogramming and I try to get some information per PHP out of an JSON string.
Therefore I used:
$json = file_get_contents('data.json')
var_dump(json_decode($json));
to get more information how php will parse my JSON file. Output of it looks like:
array(10) {
[0]=> object(stdClass)#1 (1) {
["links"]=> array(4) {
[0]=> object(stdClass)#2 (6) {
["localIP"]=> string(14) "172.29.126.189"
["remoteIP"]=> string(14) "172.29.118.193"
["validityTime"]=> int(586277)
["linkQuality"]=> float(1)
["neighborLinkQuality"]=> float(0.396)
["linkCost"]=> float(2.524) }
[1]=> object(stdClass)#3 (6) {
["localIP"]=> string(14) "172.29.126.189"
["remoteIP"]=> string(14) "172.29.149.193"
["validityTime"]=> int(551339)
["linkQuality"]=> float(1)
["neighborLinkQuality"]=> float(0.396)
["linkCost"]=> float(2.524) } } } }
...
I want to know how I would be able to display for example:
the "remoteIP" Attribute of Links[0]
all Attributes of Links[0]
Thank you for your suggestions
Whenever you have an array, you use square brackets to access any index of it. Whenever you have an object, you use the -> operator to access a property of it.
So for your examples, it would be:
$json = file_get_contents('data.json');
$data = json_decode($json);
var_dump($data[0]->links[0]->remoteIP); // remoteIP of links[0]
var_dump($data[0]->links[0]); // All attributes of links[0], as object
Another way would be (as Leo Bali pointed out), to let PHP convert all objects to arrays. In that case, you always use square brackets:
$json = file_get_contents('data.json');
$data = json_decode($json, true); // Add true here as second parameter
var_dump($data[0]['links'][0]['remoteIP']); // remoteIP of links[0]
var_dump($data[0]['links'][0]); // All attributes of links[0], as array
Related
I'm sending this JSON:
[{"tipo":""},{"activo":""},{"titulo":"Servicoasd B"},{"texto":"asdasdasd"}]
to a php file via post method.
There, i do
$obj = json_decode($_POST['sentJson']);
However, I seem to be unable to access the elements of the JSON.
var_dump(($obj));
Shows the object:
array(4) {
[0]=>
object(stdClass)#2 (1) {
["tipo"]=>
string(0) ""
}
[1]=>
object(stdClass)#3 (1) {
["activo"]=>
string(0) ""
}
[2]=>
object(stdClass)#4 (1) {
["titulo"]=>
string(9) "Servico B"
}
[3]=>
object(stdClass)#5 (1) {
["texto"]=>
string(6) "asdasd"
}
}
But if I try
$obj['texto'];
$obj->{'texto'};
$obj[0]['texto'];
$obj[0];
It shows "undefined index texto" or "trying to get property of non object in" and the last one "Object of class stdClass could not be converted to string in". I'm very new to PHP, but still I can't seem to notice what I'm doing wrong. Any help would be appreciated.
Your JSON is a serialized array of four completely different objects, so when you run json_decode, that's what you get: an array.
If you want to access your objects inside that array, access them like you would any other indexed array:
$list = json_decode(...);
foreach($list as $obj) {
var_dump($obj)
}
Or target them explicitly using plain old numerical access.
$list = json_decode(...);
$last = $list[3];
$text = $last->texto;
But really the question you should be asking is why this is the JSON you get. An array with completely different objects at each position is terrible data, and should be fixed.
This question already has an answer here:
How to extract and access data from JSON with PHP?
(1 answer)
Closed 4 years ago.
If I do a json_decode like this:
$json = json_decode($jsondata);
echo var_dump($json);
I get something like this:
object(stdClass)#1 (1)
{ ["QRY_JISGesch"]=> array(3)
{ [0]=> object(stdClass)#2 (8)
{ ["JISGeschID"]=> int(7) ["StandorteID"]=> int(0) ["FSKID"]=> int(23)
}
[1]=> object(stdClass)#3 (8)
{ ["JISGeschID"]=> int(8) ["StandorteID"]=> int(0) ["FSKID"]=> int(22)
}
[2]=> object(stdClass)#4 (8)
{ ["JISGeschID"]=> int(9) ["StandorteID"]=> int(0) ["FSKID"]=> int(1)
}
}
}
How do I find out "QRY_JISGesch" in code?
You could use reset() to get the first member of an object (or an array).
$json = json_decode($jsondata);
$first = reset($json);
If you only want the get the first "key", you can use key();
$json = json_decode($jsondata);
$key = key($json); // QRY_JISGesch
Try this. It will help you :-
$json = json_decode($jsondata, true);
// true means objects will be converted into associative arrays
and you can access QRY_JISGesch like this way :- $json['QRY_JISGesch']
Is there only one item given in the array, and you are not interested in the name itself, but the values? Then array_values could help.
Otherwise, you could use array_keys to read all keys and iterate over them? Or use a foreach loop which does not care about the array key neither.
get_object_vars (object $object) will give you a list of all accessible properties of the returned object.
I have an api wrapper i am using that returns something like this
object(stdClass)#7 (1) {
[0]=>
object(stdClass)#6 (2) {
["contactId"]=>
string(2) "nV"
["email"]=>
string(31) "email#domain.com"
}
}
how do i access the email part with PHP
Cast your API returned data to an array.
For example you are saving API returned data in $result variable. Cast it to an array.
$arrayResult = (array) $result;
echo $arrayResult[0]->email;
Try this.
I'm trying to extract a value from a JSON string that's in my program. The output of var_dump($obj); is this:
object(stdClass)#1 (1) {
["BTC"]=>
object(stdClass)#2 (2) {
["value"]=>
float(403.645)
["currency"]=>
string(3) "GBP"
}
}
What I want to access is the value (currently 403.645 in this example), but I can't work out how to do it.
I've tried $obj->value and other combinations, but get nowhere; it appears to me that this is an object inside an object and as a result I can't find out how to access it. Any help would be appreciated!
i passed a json_encoded array to javascript. Now i would like to acces that array to get the different elemtnts.
i print it out in the console.log() and i get this array:
array(1) {
[16]=>
array(2) {
[3488]=>
array(1) {
[0]=>
array(2) {
["article_no_internal"]=>
string(6) "999184"
["article_name_internal"]=>
string(29) "Geschenkbox Kerzenschein 2011"
}
}
[2615]=>
array(1) {
[0]=>
array(2) {
["article_no_internal"]=>
string(6) "700469"
["article_name_internal"]=>
string(29) "Hotelscheck RomantischeTagef2"
}
}
}
}
This is about right. How can i access the article_name of the second array, with the ID 2615?
found a related question here reading a jsone object, hope for some better explebation or answer. Thanks.
EDIT:
As it seems i made a mistake, i showed a php var_dump in the console. When i try to show the javascript array in the console i get undefined.
Since JSON means "JavaScript Object Notation" you don't need to do anything to access the object's items.
For example you can access:
jsonObject[2615][0]["article_name_internal"]
if this object is String, use eval to convert the string to a JavaScript object and access the items in the same way with the previous example.
var jsonObject = eval(jsonstring);
jsonObject[2615][0]["article_name_internal"]