DESCRIPTION
For a quick start, read /usr/share/doc/pkg-php-tools/README.PEAR or /usr/share/doc/pkg-php-tools/README.Composer.dh_phppear(1) is a debhelper program that is responsible for generating the ${phppear:*} substitutions and adding them to substvars files. See the corresponding manpage.
dh_phpcomposer(1) is a debhelper program that is responsible for generating the ${phpcomposer:*} substitutions and adding them to substvars files. See the corresponding manpage.
Debian::Debhelper::Buildsystem::phppear is an additional build system targeted at PHP PEAR packages (with a package.xml or package2.xml file).
Please note that this tool suite is not part of debhelper.