Loads the informations about current installed version of the package.
The version of installed package name.
The license this package is released under.
A short description about the package.
A long description about the package.
The date of the release of the version installed.
Description about changes on the package from previous release.
The state of the package release installed (snapshot|devel|alpha|beta|stable).
The list of dependencies for this release of the package.
The version of the XML package used to install this release (1.0 or 2.0).
The version of the PEAR packager that was used to build this release.
boolean - FALSE if the information was not available.
array - informations about the current installed version of the package (version, license, summary, description, releasedate, releasenotes, state, deps, xsdversion, packagerversion).