recently, a lot of PHP packages have been either converted from PEAR format to composer or offered in both format. Some new software has been composer-only right from the start.
As far as I know, we only have tools for automatically dealing with PEAR format packages.
This is going to get worse as the most widely used 3rd party pear server software, pirum, has been deprecated in favor of composer. This renders more and more pear based installations useless.
Do you know how other distributions handle this? Is there any effort for (semi)automatic composer->rpm conversion tools?