Overview
Instructor offers FunctionCall class to extract arguments of a function
or method from content.
This is useful when you want to build tool use capability, e.g. for AI
chatbots or agents.
Example
<?php
require 'examples/boot.php';
use Cognesy\Addons\FunctionCall\FunctionCall;
use Cognesy\Instructor\StructuredOutput;
class DataStore
{
/** Save user data to storage */
public function saveUser(string $name, int $age, string $country) : void {
// Save user to database
echo "Saving user ... saveUser('$name', $age, '$country')\n";
}
}
$text = "His name is Jason, he is 28 years old and he lives in Germany.";
$args = (new StructuredOutput)->with(
messages: $text,
responseModel: FunctionCall::fromMethodName(DataStore::class, 'saveUser'),
)->get();
echo "\nCalling the function with the extracted arguments:\n";
(new DataStore)->saveUser(...$args);
echo "\nExtracted arguments:\n";
dump($args);
assert(count($args) == 3);
expect($args['name'] === 'Jason');
expect($args['age'] == 28);
expect($args['country'] === 'Germany');
?>
Responses are generated using AI and may contain mistakes.