Mezzio Forum — Web Installer

This guide will fetch Composer and install PHP dependencies for you — no command line needed.

Environment checks

• ✅ PHP >= 8.1
• ✅ ext-pdo
• ✅ ext-json
• ✅ ext-mbstring
• ✅ ext-openssl
• ✅ ext-curl or allow_url_fopen
• ✅ public/ writable
• ✅ project writable (.env)

Step 1 — Download Composer

This downloads the official Composer PHAR to public/composer.phar.

Download Composer

Step 2 — Install PHP dependencies

Runs composer install programmatically and creates the vendor/ directory.

Install dependencies

Step 3 — Configure database

Once dependencies are installed, continue to the Mezzio installer to set DB & seed data.

Continue to installer

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Tip: If your host blocks proc_open, ask them to enable it or use a local dev machine to upload the completed vendor/ folder.