System Requirements

Web Server

FOSSBilling works with any of these:

• Apache (with mod_rewrite)
• LiteSpeed/OpenLiteSpeed Web Server
• NGINX — see recommended config

If you're using something else, you'll need to configure URL rewriting manually. Use one of our existing configurations as a reference.

PHP

• Supported Versions: 8.3, 8.4, or 8.5.
• Required Extensions: curl, dom, iconv, intl, json, openssl, pdo_mysql, xml, and zlib.
• Recommended Extensions:

  Extension	Why Recommended
  mbstring	Proper handling of multibyte characters
  opcache	Significantly improves performance
  imagick or gd	Image processing for logos and PDFs
  simplexml	Required for Plesk integration only

• Configuration (php.ini):
  • memory_limit: At least 64M. Increase if you run many modules or have high traffic.
  • max_execution_time: Default 30 seconds is usually fine. Increase to 45–60 on shared hosting if needed.
  • allow_url_fopen: Set to On if you need remote images in PDFs or emails.

Database

Tip

Use utf8mb4 with utf8mb4_unicode_ci collation. Your database user needs full privileges: SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER.

FOSSBilling requires a MySQL-compatible database:

• MySQL 8.0 or newer
• MariaDB 10.3 or newer