dev-php/
PEAR-PEAR_PackageFileManager_Plugins

Various methods to check files to update an existing package.xml file

https://pear.php.net/package/PEAR_PackageFileManager_Plugins

There are no pull requests

You think something is missing here?
Start with filling a new pull requests.

If you also like to help the Gentoo project, you can consider sending a Pull Request via GitHub.
Before doing so, you might want to take a look at the wiki page.