Installed Extensions

	5.3	5.4	5.5	5.6	7.0	7.1	7.2	7.3	7.4	8.0	8.1	8.2
apc	X	X
apcu			X	X	X	X	X	X	X
bcmath	X	X	X	X	X	X	X	X	X	X	X	X
bz2	X	X	X	X	X	X	X	X	X	X	X	X
calendar	X	X	X	X	X	X	X	X	X	X	X	X
Core	X	X	X	X	X	X	X	X	X	X	X	X
ctype	X	X	X	X	X	X	X	X	X	X	X	X
curl	X	X	X	X	X	X	X	X	X	X	X	X
date	X	X	X	X	X	X	X	X	X	X	X	X
dom	X	X	X	X	X	X	X	X	X	X	X	X
exif	X	X	X	X	X	X	X	X	X	X	X	X
fileinfo	X	X	X	X	X	X	X	X	X	X	X	X
filter	X	X	X	X	X	X	X	X	X	X	X	X
ftp	X	X	X	X	X	X	X	X	X	X	X	X
gd	X	X	X	X	X	X	X	X	X	X	X	X
gettext	X	X	X	X	X	X	X	X	X	X	X	X
hash	X	X	X	X	X	X	X	X	X	X	X	X
iconv	X	X	X	X	X	X	X	X	X	X	X	X
imagick	X	X	X	X	X	X	X	X	X
imap	X	X	X	X	X	X	X	X	X	X	X	X
intl	X	X	X	X	X	X	X	X	X	X	X	X
json	X	X	X	X	X	X	X	X	X	X	X	X
ldap	X	X	X	X	X	X	X	X	X	X	X	X
libxml	X	X	X	X	X	X	X	X	X	X	X	X
mbstring	X	X	X	X	X	X	X	X	X	X	X	X
mcrypt	X	X	X	X	X	X	X	X	X	X	X	X
memcached	X	X	X	X	X	X	X	X	X
mysqli	X	X	X	X	X	X	X	X	X	X	X	X
mysqlnd	X	X	X	X	X	X	X	X	X	X	X	X
OAuth	X	X	X	X	X	X	X	X	X
OPcache			X	X	X	X	X	X	X	X	X	X
openssl	X	X	X	X	X	X	X	X	X	X	X	X
pcntl	X	X	X	X	X	X	X	X	X	X	X	X
pcre	X	X	X	X	X	X	X	X	X	X	X	X
PDO	X	X	X	X	X	X	X	X	X	X	X	X
pdo_mysql	X	X	X	X	X	X	X	X	X	X	X	X
pdo_pgsql	X	X	X	X	X	X	X	X	X	X	X	X
pdo_sqlite	X	X	X	X	X	X	X	X	X	X	X	X
Phar	X	X	X	X	X	X	X	X	X	X	X	X
posix	X	X	X	X	X	X	X	X	X	X	X	X
readline	X	X	X	X	X	X	X	X	X	X	X	X
redis	X	X	X	X	X	X	X	X	X	X	X	X
readline	X	X	X	X	X	X	X	X	X	X	X	X
Reflection	X	X	X	X	X	X	X	X	X	X	X	X
session	X	X	X	X	X	X	X	X	X	X	X	X
SimpleXML	X	X	X	X	X	X	X	X	X	X	X	X
soap	X	X	X	X	X	X	X	X	X	X	X	X
SPL	X	X	X	X	X	X	X	X	X	X	X	X
sqlite3	X	X	X	X	X	X	X	X	X	X	X	X
standard	X	X	X	X	X	X	X	X	X	X	X	X
tokenizer	X	X	X	X	X	X	X	X	X	X	X	X
xdebug
xml	X	X	X	X	X	X	X	X	X	X	X	X
xmlreader	X	X	X	X	X	X	X	X	X	X	X	X
xmlwriter	X	X	X	X	X	X	X	X	X	X	X	X
zip	X	X	X	X	X	X	X	X	X	X	X	X
zlib	X	X	X	X	X	X	X	X	X	X	X	X

Note that xdebug is off by default but you can enable it by setting your php services config to xdebug: true. Read more about this in "Configuration" above.

Adding or removing extensions

There are a few ways you can extend or modify our php images below:

• Using build steps.
• Using your own image with service overrides.
• Building from your own local Dockerfile service overrides.

Consider the example that uses build steps to install the memcached php extension as follows:

services:
  myservice:
    type: php
    build_as_root:
      - apt-get update -y
      - apt-get install libmemcached-dev -y
      - pecl install memcached
      - docker-php-ext-enable memcached

Note the usage of docker-php-ext-enable. Our images extend the official Docker php images which ship with a bunch of helpful utility scripts to manage php extensions.