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Submitted by: Joe Thong [email protected] Site URL: http://phpdb.linuxbox.com
Description: A PHP database wrapper for various database servers with a powerful Recordset for result data manipulation. Database results are flushed automatically by phpDB.
To get this file, in the web-browser, save this file as 'Text' type as phpDB-mssql.lib
<?php
/*
Name: phpDB Microsoft SQL Server module
Version: 1.02bR6
Description: A PHP database wrapper for various
database servers with a powerful
Recordset for result data manipulation. Database
results are flushed automatically by phpDB.
*/
// Define this module, to prevent double class declaration
if (!defined("_PHPDB_ABSTRACT_LAYER"))
{
define("_PHPDB_ABSTRACT_LAYER", 1 );
}
else
return;
//------------------------------
Class Name: phpDB
//------------------------------
class phpDB
{
// public variables
var $version = '1.02bR6'; // Version number of phpDB
// This variable keeps what database type is going
// to be used. Current supported database server
// are MySQL, MSQL, SQL Server, PostgreSQL and Sybase
var $databaseType = '';
var $databaseName = ''; // Specifies which database is going to be used
// The hostname of the database server, port
// number is optional. e.g: "db.devNation.com"
var $hostname = '';
var $username = ''; // to connect to the database server
var $password = ''; // Password for the username
// Private variables ----- starts with underscore
// An array of executed querys. For results cleanup purposes
var $_queryIDList = array();
// The returned link identifier whenever a
// successful database connection is made
var $_connectionID = -1;
// A variable which was used to keep the returned last
// error message. The value will then returned
// by the errorMsg() function
var $_errorMsg = '';
// This variable keeps the last created result link identifier
var $_queryID = -1;
// A boolean variable to state whether its a
// persistent connection or normal connection
var $_isPersistentConnection = false;
// Holds the newly created result object, returned
// via the execute() method
var $_tempResultObj = '';
// A constructor function for the phpDB object.
// When initializing, specify the dbType i.e: "mysql",
// "msql", "postgresql", "mssql", and "sybase"
function phpDB($dbType = "mssql")
{
switch ($dbType)
{
case "mysql":
case "msql":
case "postgresql":
case "mssql":
case "sybase":
case "informix":
$this->databaseType = $dbType;
break;
default:
return false;
}
}
// Returns: A positive link identifier on success,
// or false on error. Connect to the server with
// the provided arguments. The connection to the server
// will be closed when the script terminates, unless
// close() function is called beforehand.
function connect($argHostname = "", $argUsername = "",
$argPassword = "", $argDatabaseName = "")
{
$boolDBSelected;
if ($argHostname != "") {
$this->hostname = $argHostname;
}
if ($argUsername != "") {
$this->username = $argUsername;
}
if ($argPassword != "") {
$this->password = $argPassword;
}
if ($argDatabaseName != "") {
$this->databaseName = $argDatabaseName;
}
$this->_connectionID = @mssql_connect($this->hostname, $this->username, $this->password);
if ($this->databaseName && $this->_connectionID) {
$boolDBSelected = @mssql_select_db($this->databaseName);
if(!$boolDBSelected) { /* If DB selection fails */
@mssql_close($this->_connectionID); /* Close the current connection */
return false;
}
}
return $this->_connectionID;
}
// Returns: A positive link identifier on success, or
// false on error Connect to the server with the provided
// arguments. The connection to the server will not be closed
// when the script terminates. Instead it will be kept for
// later future use
function pconnect($argHostname = "", $argUsername = "",
$argPassword = "", $argDatabaseName = "")
{
$boolDBSelected;
if ($argHostname != "") {
$this->hostname = $argHostname;
}
if ($argUsername != "") {
$this->username = $argUsername;
}
if ($argPassword != "") {
$this->password = $argPassword;
}
if ($argDatabaseName != "") {
$this->databaseName = $argDatabaseName;
}
$this->_connectionID = @mssql_pconnect($this->hostname, $this->username, $this->password);
if ($this->_connectionID) {
$this->_isPersistentConnection = true;
}
if ($this->databaseName && $this->_connectionID) {
$boolDBSelected = @mssql_select_db($this->databaseName);
if(!$boolDBSelected) { /* if DB selection fails */
return false; /* Persistent connection can't be closed */
}
}
return $this->_connectionID;
}
// Returns: true on success, false on error Select the
// database name to be used
function selectDB($dbName)
{
$this->databaseName = $dbName;
if ($this->_connectionID) {
return @mssql_select_db($dbName);
}
else {
/* No database selected */
return false;
}
}
// Returns: the Recordset object disregard success or
// failure Send the sql statement to the database server
function execute($sql = "")
{
$this->_queryID = @mssql_query($sql, $this->_connectionID);
// Instantiate an object without considering whether
// the query return any results or not
$this->_tempResultObj = new Recordset($this->_queryID);
$this->_insertQuery($this->_queryID);
return $this->_tempResultObj;
}
// Returns: the last error message from previous database
// operation Note: This function is NOT available for
// Microsoft SQL Server
function errorMsg()
{
$this->_errorMsg = "errorMsg() is not available for Microsoft SQL Server";
return $this->_errorMsg;
}
/* Returns: true on success, false on failure
Close the database connection. */
function close() {
if ($this->_queryIDList && sizeof($this->_queryIDList > 0)) {
while(list($_key, $_resultID) = each($this->_queryIDList)) {
@mssql_free_result($_resultID);
}
}
// If its not a persistent connection, then
// only the connection needs to be closed
if ($this->_isPersistentConnection != true) {
return @mssql_close($this->_connectionID);
}
else {
return true;
}
}
// A PRIVATE function used by the constructor function of
// the query object. insert the successful returned
// query id to the query id list. Used for later results
// cleanup. A private function that's never meant to be
// used directly
function _insertQuery($query_id) {
$this->_queryIDList[] = $query_id;
}
}
//---------------------------------------
Class Name: Recordset
//---------------------------------------
class Recordset
{
/* public variables */
var $fields;
// indicates that the current record position is
// before the first record in a Recordset object
var $BOF = null;
// indicates that the current record position is
// after the last record in a Recordset object
var $EOF = null;
// Private variables
var $_numOfRows = -1; // NEVER change the value! READ-ONLY!
var $_numOfFields = -1; // NEVER change the value! READ-ONLY!
// Holds anything that was returned from the
// database specific functions
var $_tempResult = '';
// This variable keeps the result link identifier
var $_queryID = -1;
// This variable keeps the current row in the Recordset
var $_currentRow = -1;
// Returns: query id on success and false if
// failed Constructor function
function Recordset($queryID)
{
$this->_queryID = $queryID;
if ($queryID) {
$this->_numOfRows = @mssql_num_rows($this->_queryID);
$this->_numOfFields = @mssql_num_fields($this->_queryID);
}
else {
$this->_numOfRows = 0;
$this->_numOfFields = 0;
}
// If result set contains rows
if ($this->_numOfRows > 0 && $this->_currentRow == -1) {
$this->_currentRow = 0;
$this->fields = @mssql_fetch_array($this->_queryID);
$this->EOF = false;
$this->BOF = false;
}
return $this->_queryID;
}
// Returns: true if successful, false if fail Set
// the Recordset pointer to a specified field offset.
// If the next call to fetchField() won't include a
// field offset, this field would be returned
function fieldSeek($fieldOffset = -1) {
$this->_tempResult = @mssql_field_seek($this->_queryID, $fieldOffset);
return $this->_tempResult;
}
// Returns: an object containing field information.
// Get column information in the Recordset object.
// fetchField() can be used in order to obtain information
// about fields in a certain query result. If the field
// offset isn't specified, the next field that wasn't yet
// retrieved by fetchField() is retrieved
function fetchField($fieldOffset = -1) {
if ($fieldOffset != -1) {
$this->_tempResult = @mssql_fetch_field($this->_queryID, $fieldOffset);
}
// The $fieldOffset argument is not provided thus its -1
else if ($fieldOffset == -1) {
$this->_tempResult = @mssql_fetch_field($this->_queryID);
}
return $this->_tempResult;
}
// Returns: true if there still rows available, or false
// if there are no more rows. Moves to the next row in a
// specified Recordset object and makes that record the current
// row and the data corresponding to the row will be retrieved
// into the fields collection. Note: Unlike the moveRow() method,
// when _currentRow is getNumOfRows() - 1, EOF will immediately be
// true. If row number is not provided, the function will point
// to the first row automatically
function nextRow()
{
if ($this->getNumOfRows() > 0) {
$this->fields = array();
$this->_currentRow++;
$this->fields = @mssql_fetch_array($this->_queryID);
// This is not working. True all the time
if ($this->fields) {
$this->_checkAndChangeEOF($this->_currentRow - 1);
return true;
}
}
$this->EOF = true;
return false;
}
// Returns: true on success, false on failure moveRow()
// moves the internal row pointer of the Recordset object
// to point to the specified row number and the data
// corresponding to the row will be retrieved into the fields
// collection. If row number is not provided, the function will
// point to the first row automatically
function moveRow($rowNumber = 0)
{
if ($rowNumber == 0) {
return $this->firstRow();
}
else if ($rowNumber == ($this->getNumOfRows() - 1)) {
return $this->lastRow();
}
if ($this->getNumOfRows() > 0 && $rowNumber < $this->getNumOfRows()) {
$this->fields = null;
$this->_currentRow = $rowNumber;
if(@mssql_data_seek($this->_queryID, $this->_currentRow)) {
$this->fields = @mssql_fetch_array($this->_queryID);
/* This is not working. True all the time */
if ($this->fields) {
// No need to call _checkAndChangeEOF() because
// the possibility of moving to the last row has
// been handled by the above code
$this->EOF = false;
return true;
}
}
}
$this->EOF = true;
return false;
}
// Returns: true on success, false on failure firstRow() moves
// the internal row pointer of the Recordset object to the first
// row and the data corresponding to the row will be retrieved
// into the fields collection
function firstRow()
{
if ($this->getNumOfRows() > 0) {
$this->fields = array();
$this->_currentRow = 0;
if (@mssql_data_seek($this->_queryID, $this->_currentRow)) {
$this->fields = @mssql_fetch_array($this->_queryID);
$this->EOF = false;
/* This is not working. True all the time */
if ($this->fields) {
return true;
}
}
}
$this->EOF = true;
return false;
}
// Returns: true on success, false on failure lastRow() moves
// the internal row pointer of the Recordset object to the last
// row and the data corresponding to the row will be retrieved
// into the fields collection
function lastRow()
{
if ($this->getNumOfRows() > 0) {
$this->fields = array();
$num_of_rows = $this->getNumOfRows();
$this->_tempResult = @mssql_data_seek($this->_queryID, --$num_of_rows);
if ($this->_tempResult) {
/* $num_of_rows decemented at above */
$this->_currentRow = $num_of_rows;
$this->fields = @mssql_fetch_array($this->_queryID);
/* This is not working. True all the time */
if ($this->fields) {
/* Special case for making EOF false. */
$this->EOF = false;
return true;
}
}
}
$this->EOF = true;
return false;
}
// close() only needs to be called if you are worried about using
// too much memory while your script is running. All associated
// result memory for the specified result identifier will
// automatically be freed
function close() {
$this->_tempResult = @mssql_free_result($this->_queryID);
return $this->_tempResult;
}
// Returns: the number of rows in a result set. Get
// number of rows in result
function getNumOfRows() {
return $this->_numOfRows;
}
/* Returns: the number of fields in a result set.
Get number of fields in result. */
function getNumOfFields() {
return $this->_numOfFields;
}
/* Check and change the status of EOF. */
function _checkAndChangeEOF($currentRow) {
if ($currentRow >= ($this->_numOfRows - 1)) {
$this->EOF = true;
}
else {
$this->EOF = false;
}
}
}
?>
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