(PHP 4, PHP 5, PHP 7) Closes a PostgreSQL connection

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Get the last error message string of a connection

(PECL maxdb >= 1.0) Selects the default database for database queries

(PHP 5 < 5.3.0) Force execution of a query on a slave in a master/slave setup

(PECL mongo >=0.9.0) Stores a file in the database

(PHP 4 >= 4.0.3, PHP 5, PHP 7) Sync with PostgreSQL backend

(PECL CUBRID >= 8.3.0) Return an array with the list of all existing CUBRID databases

(PHP 5, PHP 7) Returns the version of the MySQL protocol used

(PECL CUBRID >= 8.3.0) Return the type of the column corresponding to the given field offset

(PECL CUBRID >= 8.3.0) Return the client library version