(PHP 5, PHP 7) Initializes MySQLi and returns a resource for use with mysqli_real_connect()

(PHP 5 < 5.3.0) Disable reads from master

(PHP 4, PHP 5, PHP 7) Return the port number associated with the connection

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 5.3.2, PHP 7, PECL OCI8 >= 1.4.0) Sets the client identifier

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Fetches the next row from a result set

(PECL mongo >=0.9.2) Return an explanation of the query, often useful for optimization and debugging

(PECL maxdb >= 1.0) Opens a connection to a MaxDB server

(PECL tokyo_tyrant >= 0.2.0) Move to next key

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