(PECL maxdb >= 1.0) Returns a string description of the last error

(PECL mongo >=0.9.0) Gets a collection public

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

(PHP 4, PHP 5, PHP 7) Get number of rows in result

(PECL CUBRID >=8.3.0) Fetch a result row as an associative array, a numeric array, or both

(PHP 4, PHP <=5.2.0) Returns error message of last Informix call

(PECL mongo >=0.9.0) Creates a database reference

(PHP 5 >= 5.3.0, PHP 7) Returns the number of columns in the result set

(PHP 5 >= 5.1.0, PHP 7) Get result of SHOW WARNINGS

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Reset connection (reconnect)