(PECL mongo >=1.6.0) Set the read preference for this command

(PECL mongo >= 0.9.0) Checks if an array is a database reference

(PECL mongo >=1.0.3) Sets a client-side timeout for this query

(PECL mongo >=1.3.0) Set the read preference for this database

(PECL mongo >=0.9.0) Returns this file's size

(PECL mongo >=1.3.0) Returns a resource that can be used to read the stored file

(PECL mongo >=0.9.0) Returns a single file matching the criteria

(PECL mongo >= 1.3.0) Sets a callback function to be invoked for events

(PECL mongo >= 1.6.0; PHP > 5.3.4) Returns a DateTime object representing this date

(PECL mongo >= 1.0.9) Creates a new 32-bit integer.