Post PDF Download

A lightweight WordPress plugin that adds a “Download as PDF” button to your posts. When users click the button, a PDF is generated in real-time using domPDF and downloaded instantly.

🚀 Features

• 🖨️ Generate PDF files dynamically from post content
• ⚙️ Enable or disable button visibility via admin settings
• 🧩 Choose which post types display the download button
• 🧱 Clean, modular structure using Service Providers & Dependency Injection
• 🧠 Built with Composer autoload (PSR-4) for professional extensibility

🗂️ Folder Structure

post-pdf-download/
├── post-pdf-download.php          # Main plugin file
├── composer.json                  # Composer autoload and dependencies
├── vendor/                        # Composer dependencies (mPDF)
└── src/
    ├── Core/
    │   ├── Plugin.php
    │   └── DependencyInjection/
    │       └── DependencyInjection.php
    ├── Admin/
    │   └── AdminServiceProvider.php
    ├── Block/
    │   └── BlockServiceProvider.php
    ├── Pdf/
    │   └── PdfServiceProvider.php
    └── Frontend/
        └── FrontendServiceProvider.php

⚡ Installation

1. Clone or download this repository:

   git clone https://github.com/mojtaba2021/post-pdf-download.git
   cd post-pdf-download

2. Install dependencies via Composer:

   composer install

3. Zip the folder or upload directly into your WordPress /wp-content/plugins/ directory.

4. Activate Post PDF Download from your WordPress admin panel.

🧩 Usage

Once activated:

• Go to Dashboard → Post PDF Download Settings
• Enable or disable the download button
• Specify which post types should have the button
• Visit any single post — a “Download PDF” button will appear under the content
• Clicking the button generates and downloads the post as a PDF in real-time

🧱 Technical Overview

The plugin uses a Provider-based architecture with Dependency Injection:

• DependencyInjection – Manages all plugin services
• Service Providers – Each module (Admin, Frontend, PDF, Block) registers itself via a register() method
• domPDF – Converts HTML post content to downloadable PDF
• Autoload – All classes are PSR-4 autoloaded via Composer

This design keeps your code modular, testable, and extendable. You can easily add new Service Providers for additional features, e.g., custom templates or branding.

⚙️ Example Flow

1. FrontendServiceProvider adds a Download PDF button under each post
2. Button triggers an AJAX request → PdfServiceProvider generates PDF
3. PdfServiceProvider uses mPDF to convert content into a PDF
4. Browser downloads the PDF instantly

🧑‍💻 Extending the Plugin

Create a custom Service Provider:

namespace PostPDFDownload\Custom;

use PostPDFDownload\Core\DependencyInjection\DependencyInjection;
use PostPDFDownload\Core\ServiceProviderInterface;

class CustomServiceProvider implements ServiceProviderInterface {
    public function register(DependencyInjection $di) {
        // your custom logic here
    }
}

Register it in Core/Plugin.php:

$this->di->addServiceProvider( new \PostPDFDownload\Custom\CustomServiceProvider() );

🧾 Requirements

• PHP >= 8.1
• WordPress >= 6.0
• Composer
• domPDF library (composer install)

📜 License

This plugin is open-source software licensed under GPL-2.0+.

💡 Credits

Developed by Mojtaba Mohammadi Inspired by modern dependency injection patterns and clean WordPress architecture.