Creating Client for Amazon Comprehend with AWS for PHP

Hi,
Here is an example of Comprehend using the AWS SDK for PHP version 3.

<?php
   require '/root/vendor/autoload.php';
   use Aws\Comprehend\ComprehendClient;

   $client = new ComprehendClient([
       'region' => 'us-east-1',
       'version' => '2017-11-27'
    ]);

   $result = $client->detectSentiment([
      'LanguageCode' => 'en',
      'Text' => 'It was such a wonderful day full of laughter and smiles',
]);

  print($result);
?>

And this is the output:

[root@ip-172-31-88-126 work]# php test.php
Model Data
----------
Data can be retrieved from the model object using the get() method of the
model (e.g., `$result->get($key)`) or "accessing the result like an
associative array (e.g. `$result['key']`). You can also execute JMESPath
expressions on the result data using the search() method.

{
    "Sentiment": "POSITIVE",
    "SentimentScore": {
        "Positive": 0.9989492297172546,
        "Negative": 1.9858167433994822e-5,
        "Neutral": 0.0005906018195673823,
        "Mixed": 0.0004403026250656694
    },
    "@metadata": {
        "statusCode": 200,
        "effectiveUri": "https:\/\/comprehend.us-east-1.amazonaws.com",
        "headers": {
            "x-amzn-requestid": "1c39a68f-078e-4c46-be8b-4890ac395499",
            "content-type": "application\/x-amz-json-1.1",
            "content-length": "166",
            "date": "Sat, 31 Aug 2019 03:42:38 GMT"
        },
        "transferStats": {
            "http": [
                []
            ]
        }
    }
}

I used the following links to help build the above code:
Link: https://docs.aws.amazon.com/aws-sdk-php/v3/api/class-Aws.Comprehend.ComprehendClient.html
Link: https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-comprehend-2017-11-27.html
Link: https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/s3-examples-creating-buckets.html

Hope this helps!
-randy

Thanks Randy. This was helpful - making progress but not quite there yet. I had to make some slight changes and used a different require statement and also added to credentials into the new client initialization statement (Initialization 2 in the code below). When I include this, I get the following message:

"Fatal error: Uncaught exception 'Aws\Comprehend\Exception\ComprehendException' with message 'Error executing "DetectSentiment" on "https://comprehend.us-east-1.amazonaws.com"; AWS HTTP error: Client error: POST https://comprehend.us-east-1.amazonaws.com resulted in a 400 Bad Request response: {"__type":"UnrecognizedClientException","message":"The security token included in the request is invalid."} UnrecognizedClientException (client): The security token included in the request is invalid. - {"__type":"UnrecognizedClientException","message":"The security token included in the request is invalid."}' exception 'GuzzleHttp\Exception\ClientException' with message 'Client error: POST https://comprehend.us-east-1.amazonaws.com resulted in a 400 Bad Request response: {"__type":"UnrecognizedClientException","message":"The security token included in the request is invalid."} ' in C:\aws_v3\GuzzleHttp\Exception\RequestException.php:113 Stack trace: #0"/

I think this likely means that I still have to tweak the connection string. The other error I get when I use the initialization string you provided (Initialization 1 below) involves cURL:

Uncaught exception 'GuzzleHttp\Exception\ConnectException' with message 'cURL error 28: Connection timed out after 1000 milliseconds (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)' in C:\aws_v3\GuzzleHttp\Handler\CurlFactory.php:185 Stack trace: #0

My guess is that the first error / initialization string is closer to what I'll ultimately need to get past this. I've tried some other function calls with Amazon Textract and I'm running into the same pair of errors. Let me know if you have any other thoughts. Thanks!

Code:

<?php chdir("C:\aws_v3"); //require '/root/vendor/autoload.php'; require 'aws-autoloader.php'; use Aws\Comprehend\ComprehendClient; //Initialization 1 $client = new ComprehendClient(\[ 'region' => 'us-east-1', 'version' => 'latest' ]); //Initialization2 /* $access_key = "ACCESS_KEY"; $secret_key = "SECRET_KEY"; $client = new ComprehendClient(\[ 'region' => 'us-east-1', 'version' => 'latest', 'credentials' => \[ 'key' => '$access_key', 'secret' => '$secret_key' ] ]); */ $result = $client->detectSentiment(\[ 'LanguageCode' => 'en', 'Text' => 'It was such a wonderful day full of laughter and smiles', ]); print($result); ?>

This works. Just had to change the single apostrophe to quotes around the access key / secret key and it did the trick! I applied similar changes on the new client code for Textract and that did the trick as well.

Thanks again!