PDF Invoice Generator & Email Attachment for OpenCart

Problem Statement:

Managing invoices manually can be time-consuming and inefficient. Many OpenCart stores require an automated solution to generate PDF invoices, attach them to emails, and securely store them on the server. Additionally, businesses need customized invoice formats, automatic invoice number generation, and the ability to include QR codes or barcodes for better tracking.

Purpose of the Extension:

This extension is designed to simplify invoice management in OpenCart by automatically generating PDF invoices, securely storing them, and sending them to customers via email. It ensures that every invoice is professionally formatted, meets business needs, and improves order processing efficiency.

Features:

• Automatic PDF Invoice Generation – Generates invoices in PDF format when an order is placed or updated.
• Email Attachment Feature – Sends PDF invoices automatically as email attachments when a selected order status is updated.
• Multiple Order Status Triggers – Configure the extension to send invoices for multiple order statuses.
• Secure PDF Storage – Generated invoices are stored securely on the server and can only be accessed by authorized users.
• Auto-Generate Invoice Numbers – Automatically assigns invoice numbers during PDF generation.
• Customizable PDF Templates – Create and manage multiple PDF invoice templates with a built-in editor.
• Show/Hide Columns in Product Table – Choose which columns to display in the invoice for better customization.
• Support for QR Code / Barcode – Generate and display QR codes or barcodes on invoices for tracking and verification.
• Shipping Invoice & Label Generation – Create shipping invoices or shipping labels with order details.
• Automatic Shipping Email with Invoice – Sends shipping invoices to a specified email address when a selected order status is updated.
• Customizable Page Format & Orientation – Choose between different page sizes and orientations for the invoice layout.
• Watermark Support – Optionally add a watermark to invoices for branding or security.
• Secure File Storage (Optional) – Optionally save PDF invoices on the server for later access.
• Supports PHP 8+ – Fully compatible with the latest PHP versions for enhanced performance.

How to Use:

1. Install & Configure – Install the extension and set up invoice generation rules.
2. Customize Invoice Templates – Use the built-in template editor to modify the layout and design.
3. Set Email Triggers – Define which order statuses will trigger an email with a PDF invoice.
4. Enable Secure Storage – Decide whether to save invoices on the server for easy retrieval.
5. Automate Shipping Invoices – Configure automatic shipping invoices to be sent when specific statuses are updated.

Benefits:

• Saves time by automating invoice generation and email attachments.
• Enhances customer experience with professional-looking invoices.
• Improves security by ensuring invoices are accessible only to authorized users.
• Provides flexibility with multiple templates, QR codes, barcodes, and custom layouts.
• Ensures compliance by auto-generating invoice numbers and maintaining records.

Use Cases:

• Store owners who want to automate invoice sending when order statuses change.
• Businesses needing secure storage of PDF invoices for future reference.
• Companies requiring custom invoice templates tailored to branding needs.
• E-commerce platforms handling bulk orders that need efficient invoice management.

Expected Results:

• Faster invoice generation and email delivery.
• Professional, well-structured invoices with customizable templates.
• Increased customer satisfaction with automated invoice processing.
• Improved workflow efficiency and reduced manual effort.