seek (protected)

seek (
    string $selector
    , array &$ret
    , string $parent_cmd
    [, bool $lowercase = false ]
)

Parameter	Description
selector	The current selector.
ret	Previous return value (starting point).
parent_cmd	The combinator used before the current selector.
lowercase	Matches tag names case insensitive (lowercase) if enabled.

Starts by searching for child elements of $ret that match the specified selector. Adds matching elements to $ret (for the next iteration).