mixed PEAR_Dependency::checkPackage (
, string $name
, string $req
, string $relation = 'has'
Package dependencies check method
this variable will contains an error message, if check fail
Name of the package to test
Required package version to compare with
How to compare versions with eachother
FALSE if dependency could be resolved
successfully(!); or an
in case of unresolved dependency.
This function can not be called statically.