Doctrine2/QueryBuilderのコメントが素晴らしかった
実際の使用例を記すだけでこんなに解りやすくなるとは…
引用元: https://github.com/doctrine/doctrine2/blob/master/lib/Doctrine/ORM/QueryBuilder.php#L1119-L1137
/** * Adds one or more restrictions to the query results, forming a logical * disjunction with any previously specified restrictions. * * <code> * $qb = $em->createQueryBuilder() * ->select('u') * ->from('User', 'u') * ->where('u.id = 1') * ->orWhere('u.id = 2'); * </code> * * @param mixed $where The WHERE statement. * * @return self * * @see where() */ public function orWhere() { $args = func_get_args(); $where = $this->getDQLPart('where'); if ($where instanceof Expr\Orx) { $where->addMultiple($args); } else { array_unshift($args, $where); $where = new Expr\Orx($args); } return $this->add('where', $where); }