The following modules (command php -m) Highlighted are the primary modules.. I think, if nothing else it'll get you close.. List as of 2021-09-24
- bcmath
- bz2
- calendar
- Core
- ctype
- curl
- date
- dom
- exif
- FFI
- fileinfo
- filter
- ftp
- gd
- gettext
- hash
- iconv
- imap
- intl
- json
- ldap
- libxml
- mbstring
- openssl
- pcntl
- pcre
- PDO
- pdo_pgsql
- pgsql
- Phar
- posix
- readline
- Reflection
- session
- shmop
- SimpleXML
- soap
- sockets
- sodium
- SPL
- standard
- sysvmsg
- sysvsem
- sysvshm
- tokenizer
- xml
- xmlreader
- xmlwriter
- xsl
- Zend OPcache
- zip
- zlib