adodb-session2.php

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<?php


/*
V4.94 23 Jan 2007  (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved.
         Contributed by Ross Smith ([e-mail]). 
  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.
	  

*/

/*

CREATE Table SCripts

Oracle
======

CREATE TABLE SESSIONS2
(
  SESSKEY    VARCHAR2(48 BYTE)                  NOT NULL,
  EXPIRY     DATE                               NOT NULL,
  EXPIREREF  VARCHAR2(200 BYTE),
  CREATED    DATE                               NOT NULL,
  MODIFIED   DATE                               NOT NULL,
  SESSDATA   CLOB,
  PRIMARY KEY(SESSKEY)
);


CREATE INDEX SESS2_EXPIRY ON SESSIONS2(EXPIRY);
CREATE UNIQUE INDEX SESS2_PK ON SESSIONS2(SESSKEY);
CREATE INDEX SESS2_EXP_REF ON SESSIONS2(EXPIREREF);


 
 MySQL
 =====
 
CREATE TABLE sessions2(
	sesskey VARCHAR( 64 ) NOT NULL DEFAULT '',
	expiry TIMESTAMP NOT NULL ,
	expireref VARCHAR( 250 ) DEFAULT '',
	created TIMESTAMP NOT NULL ,
	modified TIMESTAMP NOT NULL ,
	sessdata LONGTEXT DEFAULT '',
	PRIMARY KEY ( sesskey ) ,
	INDEX sess2_expiry( expiry ),
	INDEX sess2_expireref( expireref )
)


*/

if (!defined('_ADODB_LAYER')) {
	require realpath(dirname(__FILE__) . '/../adodb.inc.php');
}

if (defined('ADODB_SESSION')) return 1;

define('ADODB_SESSION', dirname(__FILE__));
define('ADODB_SESSION2', ADODB_SESSION);

/* 
	Unserialize session data manually. See http://phplens.com/lens/lensforum/msgs.php?id=9821 
	
	From Kerr Schere, to unserialize session data stored via ADOdb. 
	1. Pull the session data from the db and loop through it. 
	2. Inside the loop, you will need to urldecode the data column. 
	3. After urldecode, run the serialized string through this function:

*/
function adodb_unserialize( $serialized_string ) 
{
	$variables = array( );
	$a = preg_split( "/(\w+)\|/", $serialized_string, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE );
	for( $i = 0; $i < count( $a ); $i = $i+2 ) {
		$variables[$a[$i]] = unserialize( $a[$i+1] );
	}
	return( $variables );
}

/*
	Thanks Joe Li. See http://phplens.com/lens/lensforum/msgs.php?id=11487&x=1
	Since adodb 4.61.
*/
function adodb_session_regenerate_id() 
{
	$conn =& ADODB_Session::_conn();
	if (!$conn) return false;

	$old_id = session_id();
	if (function_exists('session_regenerate_id')) {
		session_regenerate_id();
	} else {
		session_id(md5(uniqid(rand(), true)));
		$ck = session_get_cookie_params();
		setcookie(session_name(), session_id(), false, $ck['path'], $ck['domain'], $ck['secure']);
		//@session_start();
	}
	$new_id = session_id();
	$ok =& $conn->Execute('UPDATE '. ADODB_Session::table(). ' SET sesskey='. $conn->qstr($new_id). ' WHERE sesskey='.$conn->qstr($old_id));
	
	/* it is possible that the update statement fails due to a collision */
	if (!$ok) {
		session_id($old_id);
		if (empty($ck)) $ck = session_get_cookie_params();
		setcookie(session_name(), session_id(), false, $ck['path'], $ck['domain'], $ck['secure']);
		return false;
	}
	
	return true;
}

/*
    Generate database table for session data
    @see http://phplens.com/lens/lensforum/msgs.php?id=12280
    @return 0 if failure, 1 if errors, 2 if successful.
	@author Markus Staab http://www.public-4u.de
*/
function adodb_session_create_table($schemaFile=null,$conn = null)
{
    // set default values
    if ($schemaFile===null) $schemaFile = ADODB_SESSION . '/session_schema2.xml';
    if ($conn===null) $conn =& ADODB_Session::_conn();

	if (!$conn) return 0;

    $schema = new adoSchema($conn);
    $schema->ParseSchema($schemaFile);
    return $schema->ExecuteSchema();
}

/*!
	\static
*/
class ADODB_Session {
	/////////////////////
	// getter/setter methods
	/////////////////////
	
	/*
	
	function Lock($lock=null)
	{
	static $_lock = false;
	
		if (!is_null($lock)) $_lock = $lock;
		return $lock;
	}
	*/
	/*!
	*/
	function driver($driver = null) 
	{
		static $_driver = 'mysql';
		static $set = false;

		if (!is_null($driver)) {
			$_driver = trim($driver);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_DRIVER'])) {
				return $GLOBALS['ADODB_SESSION_DRIVER'];
			}
		}

		return $_driver;
	}

	/*!
	*/
	function host($host = null) {
		static $_host = 'localhost';
		static $set = false;

		if (!is_null($host)) {
			$_host = trim($host);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_CONNECT'])) {
				return $GLOBALS['ADODB_SESSION_CONNECT'];
			}
		}

		return $_host;
	}

	/*!
	*/
	function user($user = null) 
	{
		static $_user = 'root';
		static $set = false;

		if (!is_null($user)) {
			$_user = trim($user);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_USER'])) {
				return $GLOBALS['ADODB_SESSION_USER'];
			}
		}

		return $_user;
	}

	/*!
	*/
	function password($password = null) 
	{
		static $_password = '';
		static $set = false;

		if (!is_null($password)) {
			$_password = $password;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_PWD'])) {
				return $GLOBALS['ADODB_SESSION_PWD'];
			}
		}

		return $_password;
	}

	/*!
	*/
	function database($database = null) 
	{
		static $_database = '';
		static $set = false;
		
		if (!is_null($database)) {
			$_database = trim($database);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_DB'])) {
				return $GLOBALS['ADODB_SESSION_DB'];
			}
		}
		return $_database;
	}

	/*!
	*/
	function persist($persist = null) 
	{
		static $_persist = true;

		if (!is_null($persist)) {
			$_persist = trim($persist);
		}

		return $_persist;
	}

	/*!
	*/
	function lifetime($lifetime = null) 
	{
		static $_lifetime;
		static $set = false;

		if (!is_null($lifetime)) {
			$_lifetime = (int) $lifetime;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESS_LIFE'])) {
				return $GLOBALS['ADODB_SESS_LIFE'];
			}
		}
		if (!$_lifetime) {
			$_lifetime = ini_get('session.gc_maxlifetime');
			if ($_lifetime <= 1) {
				// bug in PHP 4.0.3 pl 1  -- how about other versions?
				//print "<h3>Session Error: PHP.INI setting <i>session.gc_maxlifetime</i>not set: $lifetime</h3>";
				$_lifetime = 1440;
			}
		}

		return $_lifetime;
	}

	/*!
	*/
	function debug($debug = null) 
	{
		static $_debug = false;
		static $set = false;

		if (!is_null($debug)) {
			$_debug = (bool) $debug;

			$conn = ADODB_Session::_conn();
			if ($conn) {
				$conn->debug = $_debug;
			}
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESS_DEBUG'])) {
				return $GLOBALS['ADODB_SESS_DEBUG'];
			}
		}

		return $_debug;
	}

	/*!
	*/
	function expireNotify($expire_notify = null) 
	{
		static $_expire_notify;
		static $set = false;

		if (!is_null($expire_notify)) {
			$_expire_notify = $expire_notify;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_EXPIRE_NOTIFY'])) {
				return $GLOBALS['ADODB_SESSION_EXPIRE_NOTIFY'];
			}
		}

		return $_expire_notify;
	}

	/*!
	*/
	function table($table = null) 
	{
		static $_table = 'sessions2';
		static $set = false;

		if (!is_null($table)) {
			$_table = trim($table);
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_TBL'])) {
				return $GLOBALS['ADODB_SESSION_TBL'];
			}
		}

		return $_table;
	}

	/*!
	*/
	function optimize($optimize = null) 
	{
		static $_optimize = false;
		static $set = false;

		if (!is_null($optimize)) {
			$_optimize = (bool) $optimize;
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (defined('ADODB_SESSION_OPTIMIZE')) {
				return true;
			}
		}

		return $_optimize;
	}

	/*!
	*/
	function syncSeconds($sync_seconds = null) {
		//echo ("<p>WARNING: ADODB_SESSION::syncSeconds is longer used, please remove this function for your code</p>");
		
		return 0;
	}

	/*!
	*/
	function clob($clob = null) {
		static $_clob = false;
		static $set = false;

		if (!is_null($clob)) {
			$_clob = strtolower(trim($clob));
			$set = true;
		} elseif (!$set) {
			// backwards compatibility
			if (isset($GLOBALS['ADODB_SESSION_USE_LOBS'])) {
				return $GLOBALS['ADODB_SESSION_USE_LOBS'];
			}
		}

		return $_clob;
	}

	/*!
	*/
	function dataFieldName($data_field_name = null) {
		//echo ("<p>WARNING: ADODB_SESSION::dataFieldName() is longer used, please remove this function for your code</p>");
		return '';
	}

	/*!
	*/
	function filter($filter = null) {
		static $_filter = array();

		if (!is_null($filter)) {
			if (!is_array($filter)) {
				$filter = array($filter);
			}
			$_filter = $filter;
		}

		return $_filter;
	}

	/*!
	*/
	function encryptionKey($encryption_key = null) {
		static $_encryption_key = 'CRYPTED ADODB SESSIONS ROCK!';

		if (!is_null($encryption_key)) {
			$_encryption_key = $encryption_key;
		}

		return $_encryption_key;
	}

	/////////////////////
	// private methods
	/////////////////////

	/*!
	*/
	function &_conn($conn=null) {
		return $GLOBALS['ADODB_SESS_CONN'];
	}

	/*!
	*/
	function _crc($crc = null) {
		static $_crc = false;

		if (!is_null($crc)) {
			$_crc = $crc;
		}

		return $_crc;
	}

	/*!
	*/
	function _init() {
		session_module_name('user');
		session_set_save_handler(
			array('ADODB_Session', 'open'),
			array('ADODB_Session', 'close'),
			array('ADODB_Session', 'read'),
			array('ADODB_Session', 'write'),
			array('ADODB_Session', 'destroy'),