Add Vertex AI samples about php-docs-samples

[yash30201]

Hi @cselti , sorry for the delay.

So I tried to deploy a model and the send predict requests. Following the way a model was queried in ruby, I replicated the syntax for PHP and it worked. Following is the crude way of creating a prediction request. You can extract the logic so that request making becomes easy.

$serializer = new Serializer();
$struct = $serializer->decodeMessage(new Struct(), ['fields' => ['prompt' => ['string_value' => 'Hi Model']]]);
$request = (new PredictRequest())
    ->setEndpoint($client->endpointName($projectId, $locationId, $endpointId))
    ->setInstances([
        new Value(['struct_value' => $struct])

If you face connection timeout / deadline exceed error, you can just simply increase the timeout for predict rpc according to your model's average end to end request times in the vendor/google/cloud-ai-platform/src/V1/resources/prediction_service_client_config.json

[shivgautam]

Does this example help? https://github.com/googleapis/google-cloud-php-ai-platform/blob/main/src/V1/Gapic/PredictionServiceGapicClient.php#L614-L623

[cselti]

Sadly, no, I have already checked everything in the client library's source code.
The problem is that the acceptable instance structure has not been specified.
I have tried with the same structure as in the REST API or Node.js library (and those work, of course):

$instances = new Value(['prompt' => 'Give me ten interview questions for the role of program manager.']);
// or
$instances = new Value(['content' => 'Give me ten interview questions for the role of program manager.']);
// or
$instances = new Value(['text' => 'Give me ten interview questions for the role of program manager.']);
// or
$instances = new StringValue(['input' => 'Give me ten interview questions for the role of program manager.']);
// or
$instances = new Value(['input_text' => new StringValue('Give me ten interview questions for the role of program manager.')]);
// .....

I have got always like these:

Fatal error: Uncaught UnexpectedValueException: Invalid message property: content
Fatal error: Uncaught UnexpectedValueException: Invalid message property: prompt
Fatal error: Uncaught UnexpectedValueException: Invalid message property: text
Fatal error: Uncaught UnexpectedValueException: Invalid message property: input
....

[yash30201]

Hi @cselti ,
I see that the Value is imported as Google\Protobuf\Value (ref). Also observing that Ai Platform has defined it's own Value.php with possible options as string_value, int_value and double_value.

Can you check if the following works for you?

$instances = [new Value(['string_value' => 'Give me ten interview questions for the role of program manager.'])]

[cselti]

Hi @yash30201 ,
Sadly not:

Call failed with message: {
    "message": "Invalid instance: string_value: \t \"Give me ten interview questions for the role of program manager.\"\n",
    "code": 3,
    "status": "INVALID_ARGUMENT",
    "details": []
}

It was worked for you?