Different output in AWS PHP SDK than in AWSCLI - php

Question

The primary goal that I'm trying to achieve is to iterate over my running EC2 instances in PHP.
It's really easy to get the data using a bash script, as shown below:
Bash script:
#!/bin/bash
export AWS_ACCESS_KEY_ID="AKIDEXAMPLE"
export AWS_SECRET_ACCESS_KEY="wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY"
aws ec2 describe-instances --region="eu-west-1" --filter "Name=instance-state-name,Values=running"
Bash output:
{
"Reservations": [
{
"OwnerId": "58728357357",
"ReservationId": "r-0e0283649826935",
"Instances": [
{
"SecurityGroups": [
{
"GroupId": "sg-2fe333148",
"GroupName": "WEB"
}
],
"PublicDnsName": "ec2-53-13-121-72.eu-west-1.compute.amazonaws.com",
"Architecture": "x86_64",
"LaunchTime": "2016-07-11T08:28:23.000Z",
"RootDeviceName": "/dev/sda1",
"BlockDeviceMappings": [
{
"Ebs": {
// ...
}
]
}
However, when I try the following example, using the same keys, I am presented with what seems to be an unusable object - or at least the object looks like it is representing an empty data structure.
PHP File:
<?php
require __DIR__ . "/vendor/autoload.php";
$settings = [
"version" => "latest",
"region" => "eu-west-1",
"credentials" => [
"key" => "AKIDEXAMPLE",
"secret" => "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
],
];
$client = new \Aws\Ec2\Ec2Client($settings);
$result = $client->describeInstances([
"Filters" => [
[
"Name" => "instance-state-name",
"Value" => "running",
]
],
]);
var_dump($result);
PHP Output:
What the hell am I meant to do with this AWS\Result?
class Aws\Result#82 (1) {
private $data =>
array(2) {
'Reservations' =>
array(0) {
}
'#metadata' =>
array(4) {
'statusCode' =>
int(200)
'effectiveUri' =>
string(35) "https://ec2.eu-west-1.amazonaws.com"
'headers' =>
array(5) {
...
}
'transferStats' =>
array(1) {
...
}
}
}
}
Am I missing something in the PHP configuration? Please can someone help point me in the right direction?
P.S. I've masked the API keys in the above examples.

Answer 1

EC2::DescribeInstances takes an array of filters, each of which has a string Name and an array of string Values. In your CLI example, you've supplied something for Values, whereas in your PHP example you've supplied a Value instead. This field is not recognized by the SDK and will be ignored. See the SDK API docs for more information.
Your PHP should be updated to read:
<?php
require __DIR__ . "/vendor/autoload.php";
$settings = [
"version" => "latest",
"region" => "eu-west-1",
"credentials" => [
"key" => "AKIDEXAMPLE",
"secret" => "wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY",
],
];
$client = new \Aws\Ec2\Ec2Client($settings);
$result = $client->describeInstances([
"Filters" => [
[
"Name" => "instance-state-name",
"Values" => ["running"],
]
],
]);
var_dump($result);