(PHP 5 >= 5.6.0, PHP 7) Poll the status of an in-progress asynchronous PostgreSQL connection attempt.

(PHP 5 < 5.4.0, PECL sqlite >= 1.0.1) Fetches the first column of a result set as a string

(PECL CUBRID >= 8.3.0) Close the request handle

(PECL mongo >=1.5.0) Returns an array of cursors to iterator over a full collection in parallel

(PHP 4, PHP <=5.2.0) Returns the number of columns in the query

(PHP 5 >= 5.5.0, PHP 7) Starts a transaction

(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0) Returns the version of the linked SQLite library

(PECL tokyo_tyrant >= 0.1.0) Returns the size of the value

(PECL CUBRID >= 8.3.0) Insert a single element to set type column using OID

(PHP 4 <= 4.1.0, PECL dbplus >= 0.9) Creates a new DB++ relation