1 <?php declare(strict_types=1);
3 namespace PhpParser\NodeVisitor;
6 use PhpParser\NodeTraverser;
7 use PhpParser\NodeVisitorAbstract;
10 * This visitor can be used to find the first node satisfying some criterion determined by
13 class FirstFindingVisitor extends NodeVisitorAbstract
15 /** @var callable Filter callback */
16 protected $filterCallback;
17 /** @var null|Node Found node */
20 public function __construct(callable $filterCallback) {
21 $this->filterCallback = $filterCallback;
25 * Get found node satisfying the filter callback.
27 * Returns null if no node satisfies the filter callback.
29 * @return null|Node Found node (or null if not found)
31 public function getFoundNode() {
32 return $this->foundNode;
35 public function beforeTraverse(array $nodes) {
36 $this->foundNode = null;
41 public function enterNode(Node $node) {
42 $filterCallback = $this->filterCallback;
43 if ($filterCallback($node)) {
44 $this->foundNode = $node;
45 return NodeTraverser::STOP_TRAVERSAL;