1 <?php declare(strict_types=1);
3 namespace PhpParser\NodeVisitor;
6 use PhpParser\NodeVisitorAbstract;
9 * This visitor can be used to find and collect all nodes satisfying some criterion determined by
12 class FindingVisitor extends NodeVisitorAbstract
14 /** @var callable Filter callback */
15 protected $filterCallback;
16 /** @var Node[] Found nodes */
17 protected $foundNodes;
19 public function __construct(callable $filterCallback) {
20 $this->filterCallback = $filterCallback;
24 * Get found nodes satisfying the filter callback.
26 * Nodes are returned in pre-order.
28 * @return Node[] Found nodes
30 public function getFoundNodes() : array {
31 return $this->foundNodes;
34 public function beforeTraverse(array $nodes) {
35 $this->foundNodes = [];
40 public function enterNode(Node $node) {
41 $filterCallback = $this->filterCallback;
42 if ($filterCallback($node)) {
43 $this->foundNodes[] = $node;