Warning: PDO::query(): MySQL server has gone away in C:\websites\carspares.co.uk\libs\class\Basket.class.php on line 50

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away in C:\websites\carspares.co.uk\libs\class\Basket.class.php:50
Stack trace:
#0 C:\websites\carspares.co.uk\libs\class\Basket.class.php(50): PDO->query('SELECT ID,compa...')
#1 C:\websites\carspares.co.uk\search\search-results.php(30): Basket->loadBasketItems()
#2 {main}
  thrown in C:\websites\carspares.co.uk\libs\class\Basket.class.php on line 50