openai php file to test tuned model

I have hired another freelancer to integrate my chatbot with openAI tunned model (for this project purpose lets consider I am using openAI site "upload jsonl file" to train the model. Which I have done it and its worked fine, got success message and report everything is fine). BUT none of the chatbot answers are correct. I need a freelancer that has good experience with open ai to create a SINGLE PHP file to send a static completion (hardcode at the file) using my API key and Model ID, to test if reply is correct so I can COMPARE the data of reply to the chatbot replies. If this file replies are correct (I repeat the model was trained using openai own chat feature to upload jsonl file) and the chatbot is not, I will have another job for you to help me fix my chatbot connection to openai.