Update README.md

Author: Radulepy

README.md

@@ -1,12 +1,15 @@
 # PHP-ChatGPT (OpenAI) connection
 The `index.php` is a simple .php file to connect to OpenAi's API and prompt a text request using `cUrl()`. <br>
 OPTIONAL: You can use the `ChatGPT.php` class to create both **image** and **text** request with the help of OpenAi's API. More details in comments. <br>
-Enjoy!
+
+*This is the simplest and beginner-friendly method to connect to ChatGPT API without any need of library*
 
 ## API_KEY:
 Generate an API KEY from https://beta.openai.com/account/api-keys and paste into the code.
 
 
-## Prompt
+## Optional Parameters
 Modify the prompt to fit your own needs.
-
+You can add optional parameters to the class object function calls: 
+* `echo $ai->createTextRequest("What's the best job?", 'text-davinci-003', 0.9, 300); // prompt, model, temperature, max_tokens`
+* `echo $ai->generateImage("Frog on a frozen lake", '1080x1080', 2); // prompt, imageSize, numberOfImages`