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# PEAR_DependencyDB

Table of Contents
Class Summary PEAR_DependencyDB -- Track dependency relationships between installed packages
PEAR_DependencyDB::assertDepsDB() -- Create the dependency database, if it doesn't exist. Error if the database is newer than the code reading it.
PEAR_DependencyDB::dependsOn() -- Determine whether $parent depends on $child, near or deep
PEAR_DependencyDB::getDependencies() -- Get a list of dependencies of this installed package
PEAR_DependencyDB::getDependentPackageDependencies() -- Get a list of the actual dependencies of installed packages that depend on a package.
PEAR_DependencyDB::getDependentPackages() -- Get a list of installed packages that depend on this package
PEAR_DependencyDB::hasWriteAccess() -- determines whether a dependency DB can be modified
PEAR_DependencyDB::installPackage() -- Register dependencies of a package that is being installed or upgraded
PEAR_DependencyDB::rebuildDB() -- Rebuild the dependency DB by reading registry entries.
PEAR_DependencyDB::setConfig() -- Set up the registry/location of dependency DB
PEAR_DependencyDB::singleton() -- Get a raw dependency database. Calls setConfig() and assertDepsDB()
PEAR_DependencyDB::uninstallPackage() -- Remove dependencies of a package that is being uninstalled, or upgraded.

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