(PHP Extension) Referencing a Pre-Uploaded Image File by file_id in an AI Request

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Note: This example requires Chilkat v11.4.0 or greater.

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<?php

include("chilkat.php");

$success = false;

$success = false;

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$ai = new CkAi();

// OpenAI is currently the only AI provider that supports referencing a pre-uploaded image by file_id
// in a request for text generation.
$ai->put_Provider('openai');

// Use your provider's API key.
$ai->put_ApiKey('MY_API_KEY');

// Choose a model.
$ai->put_Model('gpt-5-mini');

// See the following example showing how to upload a file
// Upload an Image File to an AI Provider

// Use the file_id of the pre-uploaded file.
$file_id = 'file-5CnBeuFasqNcAfti3cx4Fe';
$ai->InputAddImageFileId($file_id,'application/json');

$ai->InputAddText('What is in this image?');

// Ask the AI for text output.
$success = $ai->Ask('text');
if ($success == false) {
    print $ai->lastErrorText() . "\n";
    exit;
}

// Get the text response.
$sbResponse = new CkStringBuilder();
$ai->GetOutputTextSb($sbResponse);
print $sbResponse->getAsString() . "\n";

?>