get all similar keys in JSON object in PHP - php

Question

let say, i have this JSON data i want to print all key by name "id", what should i do?
$json = {"response":[
{
"id": 37,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "38"
},
{
"id": 38,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "40"
}
]}
i tried this but this one is only giving me first array object sub key(which is id=37) i want all like (id=37, id=38)
$op = $json->{'response'}[0]->{'id'};

Answer 1

If I assume your JSON is really JSON, and therefore a string, you could do this:
$json = '{"response":[
{
"id": 37,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "38"
},
{
"id": 38,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "40"
}
]}';
$data = json_decode($json);
$ids = array_column($data->response, 'id');
print_r($ids);
This would result in:
Array
(
[0] => 37
[1] => 38
)
See a PHP Fiddle.
You can turn the JSON string into a usable PHP data with json_decode().
The way to get the id's is by using array_column().

Answer 2

You can loop over your response
$array = [];
foreach ($json->{'response'} as $reponseItem){
$array[$reponseItem['id']] = $reponseItem;
}

Answer 3

You need to decode your json string into array 1st and then loop through data.
$json = ' {"response":[
{
"id": 37,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "38"
},
{
"id": 38,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "40"
}
]}';
$jsonArray =json_decode($json,true); //convert your json string to array.
$newJson = $jsonArray ['response'];
foreach($newJson as $data)
{
echo $data['id'];
}
OR You can directly loop through your $jsonArray['response'].
foreach($jsonArray['response'] as $data)
{
echo $data['id'];
}

Answer 4

$json = '{"response":[
{
"id": 37,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "38"
},
{
"id": 38,
"slug": "red",
"stock": true,
"name": "Red",
"default": 0,
"sizes": "40"
}
]}';
$data = json_decode($json); // we decode the JSON
$num = count($data->response); // we count how many response keys we have
$i=0; // define $1=0 to start our iteration
while ($i < $num) { // $i must be < than the counted array keys
$op = $data->response[$i]->id; // we tell the while loop to iterate over the array
print $op."</br>"; // prints out 37 & 38
$i++; // Standard incrementation
}