Class PhpParser\NodeVisitorAbstract

Called once before traversal. Return value semantics:

• null: $nodes stays as-is
• otherwise: $nodes is set to the return value

Called when entering a node. Return value semantics:

• null => $node stays as-is
• array (of Nodes) => The return value is merged into the parent array (at the position of the $node)
• NodeVisitor::REMOVE_NODE => $node is removed from the parent array
• NodeVisitor::REPLACE_WITH_NULL => $node is replaced with null
• NodeVisitor::DONT_TRAVERSE_CHILDREN => Children of $node are not traversed. $node stays as-is
• NodeVisitor::DONT_TRAVERSE_CURRENT_AND_CHILDREN => Further visitors for the current node are skipped, and its children are not traversed. $node stays as-is.
• NodeVisitor::STOP_TRAVERSAL => Traversal is aborted. $node stays as-is
• otherwise => $node is set to the return value

Called when leaving a node. Return value semantics:

• null => $node stays as-is
• NodeVisitor::REMOVE_NODE => $node is removed from the parent array
• NodeVisitor::REPLACE_WITH_NULL => $node is replaced with null
• NodeVisitor::STOP_TRAVERSAL => Traversal is aborted. $node stays as-is
• array (of Nodes) => The return value is merged into the parent array (at the position of the $node)
• otherwise => $node is set to the return value

Called once after traversal. Return value semantics:

• null: $nodes stays as-is
• otherwise: $nodes is set to the return value