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(PECL mongo >=0.9.0)
MongoCursor::__construct — Create a new cursor
$connection 
   ,  string $ns 
   [,  array $query  = array() 
   [,  array $fields  = array() 
  ]] )
connection Database connection.
ns Full name of database and collection.
query Database query.
fields Fields to return.
Returns the new cursor.