Cari 3 Level yg sama

muach.php

// Koneksi.php

<?php
   class Koneksi {
      private $SERVER = "localhost";
      private $DATABASE = "contoh_test";
      private $USERNAME = "root";
      private $PASSWORD = "";
      private $koneksi;
      public function __construct() {
         try {
            $dsn = "mysql:host=" . $this->SERVER . ";port=3307;dbname=" . $this->DATABASE;
            $this->koneksi = new PDO($dsn, $this->USERNAME, $this->PASSWORD);
         } catch (PDOException $e) {
            echo $e->getMessage();
         }
      }
      function getKoneksi() {
         return $this->koneksi;
      }
   }
?>

//----------------------------------------------------------------------------------------

// Pohon.php

<?php

	include_once 'koneksi.php';

	$countSameLevel = 0;
	$res = false;

	function getByUser($uid) {
		$db = new Koneksi();
		$koneksi = $db->getKoneksi();
		$sql = "SELECT * FROM user where id=$uid";
		$con = $koneksi->prepare($sql);
		$con->execute();
		return $con->fetchAll();
	}

	function getUpline($uid) {
		$db = new Koneksi();
		$koneksi = $db->getKoneksi();
		$sql = "SELECT * FROM user where upline=$uid";
		$con = $koneksi->prepare($sql);
		$con->execute();
		return $con->fetchAll();
	}

	function countLevel($upline, $level) {
		$db = new Koneksi();
		$koneksi = $db->getKoneksi();
		$sql = "SELECT * FROM user where upline=$upline AND level=$level";
		$con = $koneksi->prepare($sql);
		$con->execute();
		return $con->rowCount();
	}

	echo "<ul>";
	foreach (getByUser(1) as $row) {		
		echo "<li>" . $row['name'] . "(" . $row['level'] . ")" . "</li>";
		echo "<ul>";
			foreach (getUpline($row['id']) as $upline) {
				echo "<li>" . $upline['name'] . "(" . $upline['level'] . ")" . "</li>";
				if (!$res) {
					if (countLevel(1, $upline['level']) >= 3) {
						$res = true;
					}
				}
			}
		echo "</ul>";
	}
	echo "</ul>";

	echo "dapat bonus?\n";
	if ($res) {
		echo "<br>dapet<br>";
	} else {
		echo "<br>nggak<br>";
	}

?>