The DomCrawler seems to take the first node and traverse up the tree until the root node. But i think that the selection can have different parents, when i saw the function description i would expect it gets the parent of each node in the selection. So with 5 nodes selected i would get 5 parents, of which some could be the same parent (an array of 5 references of which some references to the same object). My suggestion would be to introduce another method with the functionality just described. About naming the methods i'm not sure yet.'