AI Chatbot for Website with ChatGPT: PHP + JavaScript Widget

AI Chatbot for Your Website with ChatGPT

Add an AI assistant to your website in hours. The chatbot answers product questions and handles support 24/7.

PHP Backend

<?php
$systemPrompt = "You are a ZevsHost support assistant. Answer concisely and helpfully.";
$client = OpenAI::client($_ENV['OPENAI_API_KEY']);
$response = $client->chat()->create([
    'model'    => 'gpt-4o-mini',
    'messages' => [
        ['role' => 'system', 'content' => $systemPrompt],
        ['role' => 'user',   'content' => $userMessage],
    ],
    'max_tokens' => 400,
]);
echo json_encode(['reply' => $response->choices[0]->message->content]);