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Mongodb - Find Embedded Array in PHP
}
   "_id": ObjectId("4f2984b1af06e80418000000"),
   "Form_Name": "Users",
   "Form_Fields": [
                  {"Field_Name": "First_Name"},
                  {"Field_Name": "Last_Name"}
                  ]
}

$collection->find(array("Form_Name"=>"Users");

First_Name, Last_Name

find(array("Form_Name=>"Users"(array(Form_Fields)))

db.collection.find({"Form_Name": "Users"}, {"Form_Fields": 1});

db.collection.find({"Form_Name": "Users"}, {"Form_Fields": 1, "_id": -1});