My build php7.2 image with:

 - gd
 - bcmath
 - intl
 - pcntl
 - mysqli
 - pdo_mysql
 - pdo_pgsql
 - mbstring
 - soap
 - iconv
 - json
 - zip
 - xml
 - sockets
 - soap
 - simplexml
 - opcache
 - mcrypt
 - iconv

AND addons like

 - swoole
 - protobuf
 - redis
 - amqp