string - How do I use a phrase with php in a mongo text search? -

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i've got simple mongo query returns result want - 

db.properties.findone({$text:{$search:'\"eiffel petit louvre\"'}})

however can't seem transpose same query php - 

$searchstring = '\"eiffel petit louvre\"'; $hotel = $db->properties->findone(         array('$text' => array('$search' => $searchstring)) );

this doesn't give me results back. doing wrong? i'm guessing it's string. i've tried escaping backslashes (i don't think should need since string uses single quotes), didn't work.

hi had exact same problem. after long trial , error figured out following works:

array('$text'=>array('$search'=>"\"$searchstring\""))

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