Is there an "or" in XPath selectors?

Question

I have the following xPath that gets the image from <div class="separator"> . My question is: how can I do xPath to search in <div class="entry"> as well?

 $img = $xpath->query('//div[@class="separator"]//img'); 

Thanks in advance:)

Answer 1

 $img = $xpath->query('//div[@class="separator" or @class="entry"]//img'); 

Answer 2

 $img = $xpath->query('//div[@class="separator"]//img | //div[@class="entry"]//img'); 

Answer 3

 $img = $xpath->query('//div[@class="separator" or @class='entry']//img');