How to install ImageMagick PHP module on Ubuntu and Debian

ImageMagick is a command-based and capable image editing suite, making it perfect as a backend to many other tools. This includes PHP with the use of imagick PHP module.

The default image library for PHP is GD. You can use ImageMagick for PHP via imagick module in Ubuntu and Debian by installing php-imagick package.

1. Open terminal from the application launcher or via the <ctrl> + <alt> + <t> keyboard shortcut.
2. Update apt's package list.

   $ sudo apt update
   [sudo] password for user:
   Hit:1 http://jp.archive.ubuntu.com/ubuntu disco InRelease
   Hit:2 http://jp.archive.ubuntu.com/ubuntu disco-updates InRelease
   Hit:3 http://jp.archive.ubuntu.com/ubuntu disco-backports InRelease
   Hit:4 http://jp.archive.ubuntu.com/ubuntu disco-security InRelease
   Reading package lists... Done
   Building dependency tree
   Reading state information... Done
   3 packages can be upgraded. Run 'apt list --upgradable' to see them.

3. Install php-imagick package via apt.

   $ sudo apt install --assume-yes php-imagick
   Reading package lists... Done
   Building dependency tree
   Reading state information... Done
   The following additional packages will be installed:
     fontconfig-config fonts-dejavu-core fonts-droid-fallback fonts-noto-mono ghostscript gsfonts
     imagemagick-6-common libavahi-client3 libavahi-common-data libavahi-common3 libcups2
     libcupsfilters1 libcupsimage2 libfftw3-double3 libfontconfig1 libgomp1 libgs9 libgs9-common
     libijs-0.35 libjbig0 libjbig2dec0 libjpeg-turbo8 libjpeg8 liblcms2-2 liblqr-1-0 libltdl7
     libmagickcore-6.q16-6 libmagickwand-6.q16-6 libpaper-utils libpaper1 libtiff5 libwebp6
     php-common php7.2-cli php7.2-common php7.2-json php7.2-opcache php7.2-phpdbg php7.2-readline
     poppler-data ttf-dejavu-core
   Suggested packages:
     fonts-noto ghostscript-x cups-common libfftw3-bin libfftw3-dev liblcms2-utils
     libmagickcore-6.q16-6-extra php-pear poppler-utils fonts-japanese-mincho | fonts-ipafont-mincho
     fonts-japanese-gothic | fonts-ipafont-gothic fonts-arphic-ukai fonts-arphic-uming fonts-nanum
   The following NEW packages will be installed:
     fontconfig-config fonts-dejavu-core fonts-droid-fallback fonts-noto-mono ghostscript gsfonts
     imagemagick-6-common libavahi-client3 libavahi-common-data libavahi-common3 libcups2
     libcupsfilters1 libcupsimage2 libfftw3-double3 libfontconfig1 libgomp1 libgs9 libgs9-common
     libijs-0.35 libjbig0 libjbig2dec0 libjpeg-turbo8 libjpeg8 liblcms2-2 liblqr-1-0 libltdl7
     libmagickcore-6.q16-6 libmagickwand-6.q16-6 libpaper-utils libpaper1 libtiff5 libwebp6
     php-common php-imagick php7.2-cli php7.2-common php7.2-json php7.2-opcache php7.2-phpdbg
     php7.2-readline poppler-data ttf-dejavu-core
   0 upgraded, 42 newly installed, 0 to remove and 2 not upgraded.
   Need to get 23.3 MB of archives.
   ##### snipped

4. Check if imagick module is loaded by PHP to confirm installation was successful.

   $ php --modules | grep imagick
   imagick

5. Restart Apache or any other services dependent on PHP.

   $ sudo systemctl restart apache2