Add required PHP modules

Install required PHP modules

$ sudo pacman -S php-gd php-imagick php-intl php-sodium

Enable required PHP modules

Edit /etc/php/php.ini file

$ sudo vi /etc/php/php.ini

uncomment following modules

curl, dom, exif, fileinfo, hash, imagick, json, mbstring, mysqli, openssl, pcre, sodium, xml, zip, bcmath, filter, gd, iconv, intl, mcrypt, simplexml, xmlreader, zlib
ssh2, ftp, sockets

Restart PHP-FPM

$ sudo systemctl restart php-fpm

Install Ghostscript

$ sudo pacman -S ghostscript