(PECL mongo >= 1.5.0) Adds a write operation to a batch

(PECL mongo >=1.5.0) Limits the number of elements returned in one batch.

(PECL mongo >=0.9.3) Runs JavaScript code on the database server [deprecated]

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

(PECL mongo >= 1.5.0) Executes a batch of write operations

(PECL mongo >= 1.0.0) The hostname of the server that encountered the error

(PECL mongo >= 1.0.11) Gets the process ID

(PECL mongo >= 0.8.0) Returns a hexidecimal representation of this id

(PECL mongo >= 0.8.1) A string representation of this regular expression

(PECL mongo >=1.2.0) Set the size for future connection pools.