Codezips — Free PHP, Python & Java Projects + AI Coding Tutorials for Students
For CS students & developer learners — updated 2026

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chatbot.php — OpenAI API
// Add AI chatbot to any PHP project $messages = [ [‘role’ => ‘system’, ‘content’ => $system_prompt], [‘role’ => ‘user’, ‘content’ => $user_message] ]; $response = callOpenAI( ‘gpt-4o-mini’, $messages ); $reply = $response[‘choices’] [0][‘message’] [‘content’];
Chatbot Added!
gpt-4o-mini · ~$0.01/day
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AI Assistant
● Online — powered by GPT-4o mini
How does the billing module work in the ISP project?
The billing module loops through all active customers, joins their record with internet_plans to get the current price, then inserts a new row into bills for the current month — but only if one doesn’t already exist (duplicate prevention).
How do I add email notifications when a bill is generated?
Use PHPMailer — install it via Composer, then after each INSERT into bills, call sendBillEmail($customer_email, $amount, $due_date). I can write the full function for you if you share your SMTP credentials format.

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