DB_OP Class Reference

A wrapper class of normally used PostgreSQL operations. More...

List of all members.

Public Member Functions
	__construct ($params)
	reconnect ()
	affected_rows ()
	select ($table, $select=array('*'))
	simple_query ($sql)
	query ($sql, $return_object=FALSE)
	load_rdriver ()
	close ()
	display_error ($error= '', $swap= '', $native=FALSE)
Private Member Functions
	initialize ()
	_connect_string ()
	db_connect ()
	db_pconnect ()
	_error_message ()

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Detailed Description

This class is used to construct database connection to a PostgreSQL database. It also includes some basic operation to database. This can be a template for future development of connecting to other databases

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Constructor & Destructor Documentation

DB_OP::__construct

(

$

params

)

Constructor. Accepts one parameter containing the database connection settings.

Parameters:

array

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Member Function Documentation

DB_OP::initialize

(

)

[private]

Initialize Database Settings. Called by the constructor.

Parameters:

void

Returns:

boolean. TRUE for successful initialisation. FALSE otherwise.

DB_OP::_connect_string

(

)

[private]

Construct connection string

Returns:

string

DB_OP::db_connect

(

)

[private]

Non-persistent database connection

Returns:

resource

DB_OP::db_pconnect

(

)

[private]

Persistent database connection

Returns:

resource

DB_OP::reconnect

(

)

Reconnect

Keep / reestablish the db connection if no queries have been sent for a length of time exceeding the server's idle timeout

Returns:

void

DB_OP::affected_rows

(

)

Affected Rows

Returns:

integer

DB_OP::select	(	$	table,
		$	select = array('*')
	)

Generates the SELECT portion of the query when multiple fileds are needed

Parameters:

	$table	Type: string.
	$select	Type: array.

Returns:

string

DB_OP::simple_query

(

$

sql

)

Simple Query This function is used for client script will process result. Or running transaction commands since they do not require all the features of the main query() function.

Parameters:

string

the sql query

Returns:

resource

DB_OP::query	(	$	sql,
		$	return_object = FALSE
	)

Execute the query

Accepts an SQL string as input and returns a result object upon successful execution of a "read" type query. Returns boolean TRUE upon successful execution of a "write" type query. Returns boolean FALSE upon failure.

Parameters:

	string	An SQL query string
	array	An array of binding data

Returns:

mixed

DB_OP::load_rdriver

(

)

Load the result drivers

Returns:

string the name of the result class

DB_OP::close

(

)

Close database connection

Returns:

void

DB_OP::_error_message

(

)

[private]

The error message string

Returns:

string

DB_OP::display_error	(	$	error = '',
		$	swap = '',
		$	native = FALSE
	)

Display an error message in some format

Parameters:

	string	the error message
	string	any "swap" values
	boolean	whether to localize the message

Returns:

string sends the application/error_db.php template

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The documentation for this class was generated from the following file:

• db_comm.php