Dompdf
Re: Dompdf
Installation requirements, usage, and securing recommendations are all described on project's wiki. The names of PHP extensions on CentOS all start with php, so e.g. MBString, GD, OPcache listed among requirements would be packaged as php-mbstring, php-gd and php-opcache, respectively. If standard CentOS repositories are not enough, you'll find more PHP-related stuff in Remi's repo.
dompdf itself is not packaged for CentOS, nor for Fedora. You may install it from GitHub.
Otherwise, you need to be more specific about your question.
dompdf itself is not packaged for CentOS, nor for Fedora. You may install it from GitHub.
Otherwise, you need to be more specific about your question.