I had an error during installation:
checking ImageMagick MagickWand API configuration program... found in /usr/bin/Wand-config
checking if ImageMagick version is at least 6.2.4... configure: error: no. You need at least Imagemagick version 6.2.4 to use Imagick.
ERROR: `/tmp/pear/temp/imagick/configure --with-imagick' failed
Set is obtained as follows:
sudo apt-get remove graphicsmagick-libmagick-dev-compat imagemagick imagemagick-common
sudo apt-get autoremove
sudo apt-get install libmagickwand-dev
sudo pecl install imagick-beta