从奇怪的JSON数组响应中提取数据

Question

I am working with an API and the response comes back weird. I need to grab the ID field from the response below.

{
    "message_campaigns": [
        {
            "embedded_errors": [],
            "id": "2729",
            "is_legacy_message": false,
            "is_setup_complete": false,
            "message_campaign_type_id": 1,
            "name": "Message Campaign 1",
            "organization_id": 123
        }
    ]
}

Below is my attempt:

$result = curl_exec($ch);
curl_close($ch);  // Seems like good practice
$responseData = json_decode($result, TRUE);
print_r($responseData);

I have tried several methods and cannot get it to work

$responseData[0]['id'];
$responseData->id;

I can't figure out how to get the id to display.

Answer 1

It's because the result is an array , as you pass the second parameter as true to json_decode :

When TRUE, returned objects will be converted into associative arrays.

In JSON, {} stands for objects, and [] stands for array. You've converted all objects to associative arrays, so this'll work:

$responseData['message_campaigns'][0]['id']

Answer 2

You have the second parameter of json_decode set to true , so an array (not an object) will be returned.

You'll also need to access message_campaigns as the first item in the array.

$responseData['message_campaigns'][0]['id'];

This can be tested:

$result = <<< EOT
{
    "message_campaigns": [
        {
            "embedded_errors": [],
            "id": "2729",
            "is_legacy_message": false,
            "is_setup_complete": false,
            "message_campaign_type_id": 1,
            "name": "Message Campaign 1",
            "organization_id": 123
        }
    ]
}
EOT;

$responseData = json_decode($result, TRUE);

echo $responseData['message_campaigns'][0]['id'];
// 2729

Answer 3

Assuming your curl_exec actually returns a response because you've set curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

If I look at your json response you need:

$responseData['message_campaigns'][0]['id'];