Replace findNodeByPath with iterative implementation

app/Dom/Node.php

@@ -176,37 +176,26 @@ class Node implements \ArrayAccess, \Iterator
 	public function getChildByPath(string $path): ?Node
 	{
 		$path = explode('.', $path);
-		return $this->findChild($path, $this);
-	}
+		$current = $this;
 
-	/**
-	 * Recursively walk nodes to find a node based on a path.
-	 *
-	 * @param  string[] $path
-	 * @param  Node     $current
-	 * @return ?Node
-	 */
-	protected function findChild(array $path, Node $current): ?Node
-	{
-		$next = array_shift($path);
-		if (is_numeric($next))
-		{
-			$next = $current[$next];
-		}
-		else
-		{
-			$next = $current->getChildByName($next);
-		}
-		if (empty($path))
+		while (sizeof($path))
 		{
-			return $next;
-		}
-		if (!isset($next))
-		{
-			return null;
-		}
+			$next = array_shift($path);
+			if (is_numeric($next))
+			{
+				$current = $current[$next];
+			}
+			else
+			{
+				$current = $current->getChildByName($next);
+			}
 
-		return $this->findChild($path, $next);
+			if (!isset($current))
+			{
+				return null;
+			}
+		}
+		return $current;
 	}
 
 	/**