php - Symfony - how to use an array as an parameter by using a querybuilder?

Solution:
I think you want to use "IN" syntax, not "=" syntax:
'SELECT w
FROM WaiverBundle:Waiver w
WHERE w.carrier IN (:carrier)
AND w.market = :market
ORDER BY w.id DESC'
Answer
Solution:
Your query is not complicated. I think you should consider QueryBuilder instead of DQL in this case. Something like this would do the trick:
$qb = $em->createQueryBuilder();
$qb->select('w')
->from('WaiverBundle:Waiver', 'w')
->where($qb->expr()->in('w.carrier', ':carrier'))
->andWhere($qb->expr()->eq('w.market', ':market'))
->orderBy('w.id', 'DESC')
->setParameters(
array(
'carrier'=>$user_airlines[0],
'market'=>$user_markets[0)
);
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