Extracted from Pike v7.8 release 866 at 2016-11-06.
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Parser
Parser.XML
Parser.XML.Tree
Parser.XML.Tree.AbstractSimpleNode

Methods
 `[]()
 add_child()
 add_child_after()
 add_child_before()
 clone()
 count_children()
 get_children()
 get_descendants()
 get_last_child()
 iterate_children()
 low_clone()
 remove_child()
 replace_child()
 replace_children()
 walk_inorder()
 walk_postorder()
 walk_preorder()
 walk_preorder_2()
 zap_tree()
previousParser.XML.Tree.AbstractSimpleNode()->walk_postorder()
Parser.XML.Tree.AbstractSimpleNode()->walk_preorder_2()next

Method Parser.XML.Tree.AbstractSimpleNode()->walk_preorder()

Method walk_preorder

int walk_preorder(function(AbstractSimpleNode:int|void) callback, mixed ... args)

Description

Traverse the node subtree in preorder, root node first, then subtrees from left to right, calling the callback function for every node. If the callback function returns STOP_WALK the traverse is promptly aborted and STOP_WALK is returned.