(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0) Register an aggregating UDF for use in SQL statements

(PHP 5, PHP 7) Performs a query on the database

(PHP 5, PHP 7) Fetch meta-data for a single field

(PHP 4 >= 4.0.7, PHP 5, PECL odbtp >= 1.1.1) Converts a 16 byte binary GUID to a string

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.2.0) Returns the number of columns in the result set

(PHP 5, PHP 7) Opens a connection to a mysql server

(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5, PECL dbx >= 1.1.0) Open a connection/database

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.2.1) Quotes a string for use in a query.

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

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Gets SQL NOTIFY message