# Technology Stack

**Analysis Date:** 2026-04-26

## Languages

**Primary:**
- PHP 7.4+ - All application code (`index.php`, `autoload/`)
- HTML/PHP - Template files (`templates/`)

**Secondary:**
- SCSS - Stylesheet authoring (`layout/style-scss/style.scss`)
- JavaScript (ES5+) - Client-side logic embedded in templates and CDN-loaded libraries

## Runtime

**Environment:**
- PHP 7.4+ on Apache (shared hosting)
- MySQL database (`srv81099_brzez_ticket`)
- Timezone: Europe/Warsaw

**Package Manager:**
- None — no Composer, no npm
- All dependencies vendored in `libraries/`

## Frameworks

**Core:**
- None — custom MVC built from scratch

**Frontend:**
- Bootstrap 5.2 — Responsive layout and components (CDN)
- jQuery 3.6 — DOM manipulation and AJAX (CDN)
- Font Awesome 6.1 — Icons (CDN)
- Flatpickr — Date picker for ticket date selection (CDN)
- DataTables — Admin order list pagination/sorting (CDN)
- html5-qrcode — Browser QR code scanner for on-site validation (CDN)

**Build/Dev:**
- Live Sass Compiler (VS Code extension) — SCSS → CSS compilation
- FTP sync via ftp-kr VS Code extension — Deployment

## Key Dependencies

**Critical:**
- Medoo — MySQL query builder (`libraries/medoo/medoo.php` — referenced in code, may be missing from repo)
- RedBeanPHP — ORM used in cron jobs (`libraries/rb.php`, 570KB single file)
- PHPMailer — SMTP email delivery (`libraries/phpmailer/class.phpmailer.php`, `class.smtp.php`)
- phpqrcode — QR code generation for tickets (`libraries/phpqrcode/qrlib.php`)

**Infrastructure:**
- PDO — Database access layer (used internally by Medoo)
- cURL — HTTP calls to Przelewy24 and fakturowo.pl APIs

## Configuration

**Environment:**
- Single file: `config.php` — contains ALL configuration
- Database credentials, SMTP settings, ticket pricing, payment gateway keys, admin password
- No `.env` files — credentials hardcoded (security concern documented in concerns.md)

**Build:**
- SCSS config in first-line comment of `layout/style-scss/style.scss`
- No build config files (vite, webpack, etc.)

## Platform Requirements

**Development:**
- Windows (VS Code with Live Sass Compiler + ftp-kr extensions)
- PHP 7.4+ locally or via FTP-direct editing
- MySQL access for schema changes

**Production:**
- Apache + mod_rewrite (shared hosting via seohost.pl)
- PHP 7.4+
- MySQL
- Outbound SMTP (port 25 to h53.seohost.pl)
- Outbound HTTPS for Przelewy24 and fakturowo.pl

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*Stack analysis: 2026-04-26*
*Update after major dependency changes*