| Methods |
public
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beforeTraverse(array $nodes): ?array
Called once before traversal.
Called once before traversal.
Return value semantics:
- null: $nodes stays as-is
- otherwise: $nodes is set to the return value
Parameters
Returns
Implements
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#
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public
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enterNode(Node $node)
Called when entering a node.
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)
- NodeTraverser::REMOVE_NODE
=> $node is removed from the parent array
- NodeTraverser::DONT_TRAVERSE_CHILDREN
=> Children of $node are not traversed. $node stays as-is
- NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN
=> Further visitors for the current node are skipped, and its children are not
traversed. $node stays as-is.
- NodeTraverser::STOP_TRAVERSAL
=> Traversal is aborted. $node stays as-is
- otherwise
=> $node is set to the return value
Parameters
Returns
Replacement node (or special return value)
Overriden by
Implements
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#
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public
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leaveNode(Node $node)
Called when leaving a node.
Called when leaving a node.
Return value semantics:
- null
=> $node stays as-is
- NodeTraverser::REMOVE_NODE
=> $node is removed from the parent array
- NodeTraverser::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
Parameters
Returns
Replacement node (or special return value)
Implements
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#
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public
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afterTraverse(array $nodes): ?array
Called once after traversal.
Called once after traversal.
Return value semantics:
- null: $nodes stays as-is
- otherwise: $nodes is set to the return value
Parameters
Returns
Implements
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#
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