fun/web/documentation/extensions/extensions.md

layout	published	noToc	noComments	noDate	title	subtitle	description	permalink	lang	tags
page	true	false	false	false	Optional extensions	Catalog of optional, build-time selectable extensions for the Fun VM (e.g., cURL, SQLite, JSON).	Catalog of optional, build-time selectable extensions for the Fun VM (e.g., cURL, SQLite, JSON).	/documentation/extensions/	en	area catalog contains env example examples extension extensions integrations optional required requirements run scripts them under vars what

This section documents Fun's optional, build-time selectable extensions. Each page covers:

• How to enable the extension via CMake option (FUN_WITH_*)
• Build requirements and detection notes
• Available opcodes and/or helper functions
• Minimal usage examples and links to example scripts

Extensions:

• cURL (libcurl)
• INI (iniparser)
• JSON (json-c)
• libxml2 (XML)
• SQLite
• PCRE2 (Perl-compatible regex)
• PC/SC (Smart cards)
• OpenSSL
• kcgi
• Redis (hiredis)

Notes:

• These integrations are optional; the VM compiles without them.
• When disabled, related builtins usually return empty strings/neutral values rather than fail hard, mirroring existing optionality patterns.