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Overview

Prompt class in Instructor PHP provides a way to define and use prompt templates using Twig or Blade template syntax.

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Example

<?php
$loader = require 'vendor/autoload.php';
$loader->add('Cognesy\\Instructor\\', __DIR__ . '../../src/');

use Cognesy\Instructor\Extras\Prompt\Prompt;
use Cognesy\Instructor\Features\LLM\Inference;
use Cognesy\Instructor\Utils\Str;

// EXAMPLE 1: Define prompt template inline (don't use files) and use short syntax

$prompt = Prompt::twig()
    ->from('What is capital of {{country}}')
    ->with(['country' => 'Germany'])
    ->toText();

$answer = (new Inference)->create(
    messages: $prompt
)->toText();

echo "EXAMPLE 1: prompt = $prompt\n";
echo "ASSISTANT: $answer\n";
echo "\n";
assert(Str::contains($answer, 'Berlin'));


// EXAMPLE 2: Use Prompt library to load prompt from file

// use default template language, prompt files are in /prompts/twig/<prompt>.twig
$prompt = Prompt::text(
    pathOrDsn: 'demo-twig:capital',
    variables: ['country' => 'Germany'],
);

$answer = (new Inference)->create(messages: $prompt)->toText();

echo "EXAMPLE 2: prompt = $prompt\n";
echo "ASSISTANT: $answer\n";
echo "\n";
assert(Str::contains($answer, 'Berlin'));

?>
Working directly with LLMs and JSON - Tools modeGenerating JSON Schema from PHP classes