Phan\BlockAnalysisVisitor::visit PHP Method

    public function visit(Node $node) : Context
    {
        $context = $this->context->withLineNumberStart($node->lineno ?? 0);
        // Visit the given node populating the code base
        // with anything we learn and get a new context
        // indicating the state of the world within the
        // given node
        $context = (new PreOrderAnalysisVisitor($this->code_base, $context))($node);
        assert(!empty($context), 'Context cannot be null');
        // With a context that is inside of the node passed
        // to this method, we analyze all children of the
        // node.
        foreach ($node->children ?? [] as $child_node) {
            // Skip any non Node children or boring nodes
            // that are too deep.
            if (!$child_node instanceof Node || !Analysis::shouldVisit($child_node)) {
                $context->withLineNumberStart($child_node->lineno ?? 0);
                continue;
            }
            // Step into each child node and get an
            // updated context for the node
            $context = (new BlockAnalysisVisitor($this->code_base, $context, $node, $this->depth + 1))($child_node);
        }
        // Now that we know all about our context (like what
        // 'self' means), we can analyze statements like
        // assignments and method calls.
        $context = (new PostOrderAnalysisVisitor($this->code_base, $context->withLineNumberStart($node->lineno ?? 0), $this->parent_node))($node);
        // Let any configured plugins analyze the node
        ConfigPluginSet::instance()->analyzeNode($this->code_base, $context, $node, $this->parent_node);
        return $context;
    }