SnapGallery — PHP Image Gallery with Lightbox, Upload & Admin

SnapGallery — PHP Image Gallery with Lightbox, Upload & Admin

A small, self-contained PHP photo gallery script — upload photos with drag & drop, browse them in a responsive dark-mode grid, view full-size in a smooth lightbox, and manage everything from a password-protected admin page. No database needed — works on any shared PHP hosting in under 2 minutes.

Features

• Drag & drop photo upload — drop multiple images at once with live previews, or click to browse (JPG, PNG, GIF, WebP up to 5 MB each)
• Lightbox viewer — click any photo for full-size view with previous/next buttons, keyboard navigation (arrow keys + Esc), and a photo counter
• Auto thumbnails — server-side thumbnails via GD when available, graceful CSS fallback on hosts without GD
• Password-protected admin panel — log in and delete photos with one click; sessions keep the panel secure
• Real security built in — real MIME validation (not just file extension), randomized filenames, .htaccess blocks script execution in the uploads folder, XSS-safe output everywhere
• Zero dependencies — pure PHP + vanilla HTML/CSS/JS, no frameworks, no database, no build step; responsive design that works on mobile

What's Inside

• index.php — public gallery: grid, upload form, lightbox
• upload.php — upload handler with validation (AJAX, JSON)
• admin.php — admin login + photo delete page
• config.php — settings: admin password, upload rules, thumbnail sizes
• includes/functions.php — helpers: uploads, thumbnails, security
• assets/style.css, assets/script.js — dark theme + lightbox JS
• README.txt — 2-minute setup guide

Setup

1. Upload the folder to your web host. 2. Open it once — the data, uploads and thumbs folders are created automatically. 3. Change the admin password in config.php (default: gallery123). Done!

Perfect For

Portfolio sites, event photo pages, client proofing galleries, wedding/family photo sharing, or learning how file uploads, thumbnails and sessions work in PHP.

Need a Custom Website or Mobile App?

Downloading free code is just the start. Yadu Tech builds complete websites and mobile apps for businesses — design, development, deployment, all done for you.

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