@ajheutinck it depends very much on what kind of server you’re on, how your PHP was installed, and what control you have over it. Personally I’m using a Centos 7 machine with WHM and EasyApache 4 with PHP 7.4 installed, so for me to install the ‘intl’ package:
yum install ea-php74-php-intl
After this, phpinfo() shows an “Intl” section with two tables of data. Your situation may be very, very different. You may be able to use a web based admin panel to add the ‘intl’ module to your Apache installation with any command line required. Or you may not be running Apache at all, but some other web server with PHP installed.
