array|false
     PEAR_DependencyDB::getDependencies
     ( 
    
     PEAR_PackageFile_v1|PEAR_PackageFile_v2|array
     &$pkg
    
   )
get an array of all immediate package dependencies of an installed package.
&$pkg
     This parameter, if an array, should be in format:
throws no exceptions thrown
This function can not be called statically.