$ cd 7.1
$ docker build -t gap-php-dev .
$ docker run -it php-dev /bin/bash
# php -m // List Compiled PHP Modules
[PHP Modules]
bz2
Core
ctype
curl
date
dom
fileinfo
filter
ftp
hash
iconv
json
libxml
mbstring
mcrypt
mysqlnd
openssl
pcre
PDO
pdo_mysql
pdo_sqlite
Phar
posix
readline
redis
Reflection
session
SimpleXML
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
zip
zlib