title: How can I try to get information from 2 or more collections in MongoDB using PHP driver
body: <p>I need to get information about 2 different collections in MongoDB using PHP mongo driver.</p>
  
  <p>I know that recently Mongo University added a new feature called 'lookup' but I don't know how can I apply this option in the php mongo find() method. (Seems that is not ready for php)</p>
  
  <p>Anyway what could be the best option to get information from more than a collection?</p>
  
  <p>Create a temporal collection adding the information from each collection?</p>