POS to WhatsApp PDF Invoice Integration

Job ID: 39309888

Budget: $10 – $30 USD

I need a PHP Point of Sale (POS) system expert who can integrate my fully set up WhatsApp Business API to automatically send PDF invoices to customers after a sale.

Key Tasks:
1. Review and troubleshoot my current whatsapp_hook.php script.
2. Ensure the webhook accurately receives JSON POST data from the POS or any HTTP client.
3. Confirm the messages are sent correctly via the WhatsApp Cloud API (using access token and phone number ID).
4. Modify the script to dynamically generate the PDF invoice URL using a sale_id, if available in the incoming data.
5. Conduct a final test to check if messages are successfully sent to a registered WhatsApp number in the sandbox.

The JSON POST data includes sales information, and I have a developer Facebook account with API access and a number. Please note, the PDF invoice URL is currently static.

Ideal skills include:
- Proficient in PHP and familiar with PHP Point of Sale system
- Experienced with WhatsApp Business API
- Strong troubleshooting and debugging skills
- Able to modify scripts and dynamically generate URLs
- Good understanding of JSON POST data
Related categories: PHP XML Software Architecture MySQL