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<?php
/**
* @version V5.04a 25 Mar 2008 (c) 2000-2008 John Lim (jlim#natsoft.com.my). All rights reserved.
* Released under both BSD license and Lesser GPL library license.
* Whenever there is any discrepancy between the two licenses,
* the BSD license will take precedence.
*
* Set tabs to 4 for best viewing.
*
* PEAR DB Emulation Layer for ADODB.
*
* The following code is modelled on PEAR DB code by Stig Bakken <ssb@fast.no> |
* and Tomas V.V.Cox <cox@idecnet.com>. Portions (c)1997-2002 The PHP Group.
*/
/*
We support:
DB_Common
---------
query - returns PEAR_Error on error
limitQuery - return PEAR_Error on error
prepare - does not return PEAR_Error on error
execute - does not return PEAR_Error on error
setFetchMode - supports ASSOC and ORDERED
errorNative
quote
nextID
disconnect
getOne
getAssoc
getRow
getCol
getAll
DB_Result
---------
numRows - returns -1 if not supported
numCols
fetchInto - does not support passing of fetchmode
fetchRows - does not support passing of fetchmode
free
*/
define('ADODB_PEAR',dirname(__FILE__));
include_once "PEAR.php";
include_once ADODB_PEAR."/adodb-errorpear.inc.php";
include_once ADODB_PEAR."/adodb.inc.php";
if (!defined('DB_OK')) {
define("DB_OK", 1);
define("DB_ERROR",-1);
// autoExecute constants
define('DB_AUTOQUERY_INSERT', 1);
define('DB_AUTOQUERY_UPDATE', 2);
/**
* This is a special constant that tells DB the user hasn't specified
* any particular get mode, so the default should be used.
*/
define('DB_FETCHMODE_DEFAULT', 0);
/**
* Column data indexed by numbers, ordered from 0 and up
*/
define('DB_FETCHMODE_ORDERED', 1);
/**
* Column data indexed by column names
*/
define('DB_FETCHMODE_ASSOC', 2);
/* for compatibility */
define('DB_GETMODE_ORDERED', DB_FETCHMODE_ORDERED);
define('DB_GETMODE_ASSOC', DB_FETCHMODE_ASSOC);
/**
* these are constants for the tableInfo-function
* they are bitwised or'ed. so if there are more constants to be defined
* in the future, adjust DB_TABLEINFO_FULL accordingly
*/
define('DB_TABLEINFO_ORDER', 1);
define('DB_TABLEINFO_ORDERTABLE', 2);
define('DB_TABLEINFO_FULL', 3);
}
/**
* The main "DB" class is simply a container class with some static
* methods for creating DB objects as well as some utility functions
* common to all parts of DB.
*
*/
class DB
{
/**
* Create a new DB object for the specified database type
*
* @param $type string database type, for example "mysql"
*
* @return object a newly created DB object, or a DB error code on
* error
*/
function factory($type)
{
include_once(ADODB_DIR."/drivers/adodb-$type.inc.php");
$obj = NewADOConnection($type);
if (!is_object($obj)) $obj = new PEAR_Error('Unknown Database Driver: '.$dsninfo['phptype'],-1);
return $obj;
}
/**
* Create a new DB object and connect to the specified database
*
* @param $dsn mixed "data source name", see the DB::parseDSN
* method for a description of the dsn format. Can also be
* specified as an array of the format returned by DB::parseDSN.
*
* @param $options mixed if boolean (or scalar), tells whether
* this connection should be persistent (for backends that support
* this). This parameter can also be an array of options, see
* DB_common::setOption for more information on connection
* options.
*
* @return object a newly created DB connection object, or a DB
* error object on error
*
* @see DB::parseDSN
* @see DB::isError
*/
function connect($dsn, $options = false)
{
if (is_array($dsn)) {
$dsninfo = $dsn;
} else {
$dsninfo = DB::parseDSN($dsn);
}
switch ($dsninfo["phptype"]) {
case 'pgsql': $type = 'postgres7'; break;
case 'ifx': $type = 'informix9'; break;
default: $type = $dsninfo["phptype"]; break;
}
if (is_array($options) && isset($options["debug"]) &&
$options["debug"] >= 2) {
// expose php errors with sufficient debug level
@include_once("adodb-$type.inc.php");
} else {
@include_once("adodb-$type.inc.php");
}
@$obj = NewADOConnection($type);
if (!is_object($obj)) {
$obj = new PEAR_Error('Unknown Database Driver: '.$dsninfo['phptype'],-1);
return $obj;
}
if (is_array($options)) {
foreach($options as $k => $v) {
switch(strtolower($k)) {
case 'persist':
case 'persistent': $persist = $v; break;
#ibase
case 'dialect': $obj->dialect = $v; break;
case 'charset': $obj->charset = $v; break;
case 'buffers': $obj->buffers = $v; break;
#ado
case 'charpage': $obj->charPage = $v; break;
#mysql
case 'clientflags': $obj->clientFlags = $v; break;
}
}
} else {
$persist = false;
}
if (isset($dsninfo['socket'])) $dsninfo['hostspec'] .= ':'.$dsninfo['socket'];
else if (isset($dsninfo['port'])) $dsninfo['hostspec'] .= ':'.$dsninfo['port'];
if($persist) $ok = $obj->PConnect($dsninfo['hostspec'], $dsninfo['username'],$dsninfo['password'],$dsninfo['database']);
else $ok = $obj->Connect($dsninfo['hostspec'], $dsninfo['username'],$dsninfo['password'],$dsninfo['database']);
if (!$ok) $obj = ADODB_PEAR_Error();
return $obj;
}
/**
* Return the DB API version
*
* @return int the DB API version number
*/
function apiVersion()
{
return 2;
}
/**
* Tell whether a result code from a DB method is an error
*
* @param $value int result code
*
* @return bool whether $value is an error
*/
function isError($value)
{
if (!is_object($value)) return false;
$class = get_class($value);
return $class == 'pear_error' || is_subclass_of($value, 'pear_error') ||
$class == 'db_error' || is_subclass_of($value, 'db_error');
}
/**
* Tell whether a result code from a DB method is a warning.
* Warnings differ from errors in that they are generated by DB,
* and are not fatal.
*
* @param $value mixed result value
*
* @return bool whether $value is a warning
*/
function isWarning($value)
{
return false;
/*
return is_object($value) &&
(get_class( $value ) == "db_warning" ||
is_subclass_of($value, "db_warning"));*/
}
/**
* Parse a data source name
*
* @param $dsn string Data Source Name to be parsed
*
* @return array an associative array with the following keys:
*
* phptype: Database backend used in PHP (mysql, odbc etc.)
* dbsyntax: Database used with regards to SQL syntax etc.
* protocol: Communication protocol to use (tcp, unix etc.)
* hostspec: Host specification (hostname[:port])
* database: Database to use on the DBMS server
* username: User name for login
* password: Password for login
*
* The format of the supplied DSN is in its fullest form:
*
* phptype(dbsyntax)://username:password@protocol+hostspec/database
*
* Most variations are allowed:
*
* phptype://username:password@protocol+hostspec:110//usr/db_file.db
* phptype://username:password@hostspec/database_name
* phptype://username:password@hostspec
* phptype://username@hostspec
* phptype://hostspec/database
* phptype://hostspec
* phptype(dbsyntax)
* phptype
*
* @author Tomas V.V.Cox <cox@idecnet.com>
*/
function parseDSN($dsn)
{
if (is_array($dsn)) {
return $dsn;
}
$parsed = array(
'phptype' => false,
'dbsyntax' => false,
'protocol' => false,
'hostspec' => false,
'database' => false,
'username' => false,
'password' => false
);
// Find phptype and dbsyntax
if (($pos = strpos($dsn, '://')) !== false) {
$str = substr($dsn, 0, $pos);
$dsn = substr($dsn, $pos + 3);
} else {
$str = $dsn;
$dsn = NULL;
}
// Get phptype and dbsyntax
// $str => phptype(dbsyntax)
if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) {
$parsed['phptype'] = $arr[1];
$parsed['dbsyntax'] = (empty($arr[2])) ? $arr[1] : $arr[2];
} else {
$parsed['phptype'] = $str;
$parsed['dbsyntax'] = $str;
}
if (empty($dsn)) {
return $parsed;
}
// Get (if found): username and password
// $dsn => username:password@protocol+hostspec/database
if (($at = strpos($dsn,'@')) !== false) {
$str = substr($dsn, 0, $at);
$dsn = substr($dsn, $at + 1);
if (($pos = strpos($str, ':')) !== false) {
$parsed['username'] = urldecode(substr($str, 0, $pos));
$parsed['password'] = urldecode(substr($str, $pos + 1));
} else {
$parsed['username'] = urldecode($str);
}
}
// Find protocol and hostspec
// $dsn => protocol+hostspec/database
if (($pos=strpos($dsn, '/')) !== false) {
$str = substr($dsn, 0, $pos);
$dsn = substr($dsn, $pos + 1);
} else {
$str = $dsn;
$dsn = NULL;
}
// Get protocol + hostspec
// $str => protocol+hostspec
if (($pos=strpos($str, '+')) !== false) {
$parsed['protocol'] = substr($str, 0, $pos);
$parsed['hostspec'] = urldecode(substr($str, $pos + 1));
} else {
$parsed['hostspec'] = urldecode($str);
}
// Get dabase if any
// $dsn => database
if (!empty($dsn)) {
$parsed['database'] = $dsn;
}
return $parsed;
}
/**
* Load a PHP database extension if it is not loaded already.
*
* @access public
*
* @param $name the base name of the extension (without the .so or
* .dll suffix)
*
* @return bool true if the extension was already or successfully
* loaded, false if it could not be loaded
*/
function assertExtension($name)
{
if (!extension_loaded($name)) {
$dlext = (strncmp(PHP_OS,'WIN',3) === 0) ? '.dll' : '.so';
@dl($name . $dlext);
}
if (!extension_loaded($name)) {
return false;
}
return true;
}
}
?>
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