(PECL mongo >= 0.9.0) Creates a new database reference

(PECL mongo >=1.2.0) Get pool size for connection pools

(PECL mongo >=1.5.0) Get the write concern for this database

(PECL mongo >=0.9.0) Advances the cursor to the next result, and returns that result

(PECL mongo >=0.9.0) Update records based on a given criteria

(PECL mongo >=1.6.0) Get the read preference for this query

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

(PECL mongo >=0.9.0) Converts keys specifying an index to its identifying string

(PECL mongo >=1.3.0) Get the read preference for this connection

(PECL mongo >=0.9.0) Creates a database reference