function _extractErrors($err = null)
    {
        static $errors = array();
        if ($err === null) {
            $e = $errors;
            $errors = array();
            return $e;
        }
        $errors[] = $err->getMessage();
    }
function _extractErrors($err = null)
    {
        static $errors = array();
        if ($err === null) {
            $e = $errors;
            $errors = array();
            return $e;
        }
        $errors[] = $err->getMessage();
    }
function _extractErrors ( $ err = null ) { static $ errors = array ( ) ; if ( $ err === null ) { $ e = $ errors ; $ errors = array ( ) ; return $ e ; } $ errors [ ] = $ err -> getMessage ( ) ; }
helper callback for extracting Archive_Tar errors

@param PEAR_Error|null $err
@return array
@access private
helper callback for extracting Archive_Tar errors