Pulling data from weird JSON array response - php

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

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'];

Answer 2

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 3

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