You can always find where files are on your system using the locate database like this: locate -i filename. However in the case of packages, sometimes browsing is more useful. Since you installed the package using apt-get, you can get a listing of all the files owned by the package and where they went on the system like this:
dpkg -L php-pear
However that is just the overall pear package system and the wires that connect it to php, I don't think that includes the entire archive of PEAR projects. It is likely that you need to install specific PEAR packages fro each things you need to do. These will either be in the package repository, or you will need to use the pear installer to fetch them.
You can always find where files are on your system using the locate database like this:
locate -i filename. However in the case of packages, sometimes browsing is more useful. Since you installed the package using apt-get, you can get a listing of all the files owned by the package and where they went on the system like this:However that is just the overall pear package system and the wires that connect it to php, I don't think that includes the entire archive of PEAR projects. It is likely that you need to install specific PEAR packages fro each things you need to do. These will either be in the package repository, or you will need to use the pear installer to fetch them.