Set tabs to 4 for best viewing. Latest version of ADODB is available at http://php.weblogs.com/adodb ====================================================================== This file provides PHP4 session management using the ADODB database wrapper library. Example ======= include('adodb.inc.php'); #---------------------------------# include('adodb-cryptsession.php'); #---------------------------------# session_start(); session_register('AVAR'); $_SESSION['AVAR'] += 1; print " -- \$_SESSION['AVAR']={$_SESSION['AVAR']}

"; Installation ============ 1. Create a new database in MySQL or Access "sessions" like so: create table sessions ( SESSKEY char(32) not null, EXPIRY int(11) unsigned not null, EXPIREREF varchar(64), DATA CLOB, primary key (sesskey) ); 2. Then define the following parameters. You can either modify this file, or define them before this file is included: $ADODB_SESSION_DRIVER='database driver, eg. mysql or ibase'; $ADODB_SESSION_CONNECT='server to connect to'; $ADODB_SESSION_USER ='user'; $ADODB_SESSION_PWD ='password'; $ADODB_SESSION_DB ='database'; $ADODB_SESSION_TBL = 'sessions' 3. Recommended is PHP 4.0.2 or later. There are documented session bugs in earlier versions of PHP. */ include_once('crypt.inc.php'); if (!defined('_ADODB_LAYER')) { include (dirname(__FILE__).'/adodb.inc.php'); } /* if database time and system time is difference is greater than this, then give warning */ define('ADODB_SESSION_SYNCH_SECS',60); if (!defined('ADODB_SESSION')) { define('ADODB_SESSION',1); GLOBAL $ADODB_SESSION_CONNECT, $ADODB_SESSION_DRIVER, $ADODB_SESSION_USER, $ADODB_SESSION_PWD, $ADODB_SESSION_DB, $ADODB_SESS_CONN, $ADODB_SESS_LIFE, $ADODB_SESS_DEBUG, $ADODB_SESS_INSERT, $ADODB_SESSION_EXPIRE_NOTIFY, $ADODB_SESSION_TBL; //$ADODB_SESS_DEBUG = true; /* SET THE FOLLOWING PARAMETERS */ if (empty($ADODB_SESSION_DRIVER)) { $ADODB_SESSION_DRIVER='mysql'; $ADODB_SESSION_CONNECT='localhost'; $ADODB_SESSION_USER ='root'; $ADODB_SESSION_PWD =''; $ADODB_SESSION_DB ='xphplens_2'; } if (empty($ADODB_SESSION_TBL)){ $ADODB_SESSION_TBL = 'sessions'; } if (empty($ADODB_SESSION_EXPIRE_NOTIFY)) { $ADODB_SESSION_EXPIRE_NOTIFY = false; } function ADODB_Session_Key() { $ADODB_CRYPT_KEY = 'CRYPTED ADODB SESSIONS ROCK!'; /* USE THIS FUNCTION TO CREATE THE ENCRYPTION KEY FOR CRYPTED SESSIONS */ /* Crypt the used key, $ADODB_CRYPT_KEY as key and session_ID as SALT */ return crypt($ADODB_CRYPT_KEY, session_ID()); } $ADODB_SESS_LIFE = ini_get('session.gc_maxlifetime'); if ($ADODB_SESS_LIFE <= 1) { // bug in PHP 4.0.3 pl 1 -- how about other versions? //print "

Session Error: PHP.INI setting session.gc_maxlifetimenot set: $ADODB_SESS_LIFE

"; $ADODB_SESS_LIFE=1440; } function adodb_sess_open($save_path, $session_name) { GLOBAL $ADODB_SESSION_CONNECT, $ADODB_SESSION_DRIVER, $ADODB_SESSION_USER, $ADODB_SESSION_PWD, $ADODB_SESSION_DB, $ADODB_SESS_CONN, $ADODB_SESS_DEBUG; $ADODB_SESS_INSERT = false; if (isset($ADODB_SESS_CONN)) return true; $ADODB_SESS_CONN = ADONewConnection($ADODB_SESSION_DRIVER); if (!empty($ADODB_SESS_DEBUG)) { $ADODB_SESS_CONN->debug = true; print" conn=$ADODB_SESSION_CONNECT user=$ADODB_SESSION_USER pwd=$ADODB_SESSION_PWD db=$ADODB_SESSION_DB "; } return $ADODB_SESS_CONN->PConnect($ADODB_SESSION_CONNECT, $ADODB_SESSION_USER,$ADODB_SESSION_PWD,$ADODB_SESSION_DB); } function adodb_sess_close() { global $ADODB_SESS_CONN; if ($ADODB_SESS_CONN) $ADODB_SESS_CONN->Close(); return true; } function adodb_sess_read($key) { $Crypt = new MD5Crypt; global $ADODB_SESS_CONN,$ADODB_SESS_INSERT,$ADODB_SESSION_TBL; $rs = $ADODB_SESS_CONN->Execute("SELECT data FROM $ADODB_SESSION_TBL WHERE sesskey = '$key' AND expiry >= " . time()); if ($rs) { if ($rs->EOF) { $ADODB_SESS_INSERT = true; $v = ''; } else { // Decrypt session data $v = rawurldecode($Crypt->Decrypt(reset($rs->fields), ADODB_Session_Key())); } $rs->Close(); return $v; } else $ADODB_SESS_INSERT = true; return ''; } function adodb_sess_write($key, $val) { $Crypt = new MD5Crypt; global $ADODB_SESS_INSERT,$ADODB_SESS_CONN, $ADODB_SESS_LIFE, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY; $expiry = time() + $ADODB_SESS_LIFE; // encrypt session data.. $val = $Crypt->Encrypt(rawurlencode($val), ADODB_Session_Key()); $arr = array('sesskey' => $key, 'expiry' => $expiry, 'data' => $val); if ($ADODB_SESSION_EXPIRE_NOTIFY) { $var = reset($ADODB_SESSION_EXPIRE_NOTIFY); global $$var; $arr['expireref'] = $$var; } $rs = $ADODB_SESS_CONN->Replace($ADODB_SESSION_TBL, $arr, 'sesskey',$autoQuote = true); if (!$rs) { ADOConnection::outp( ' -- Session Replace: '.$ADODB_SESS_CONN->ErrorMsg().'

',false); } else { // bug in access driver (could be odbc?) means that info is not commited // properly unless select statement executed in Win2000 if ($ADODB_SESS_CONN->databaseType == 'access') $rs = $ADODB_SESS_CONN->Execute("select sesskey from $ADODB_SESSION_TBL WHERE sesskey='$key'"); } return isset($rs); } function adodb_sess_destroy($key) { global $ADODB_SESS_CONN, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY; if ($ADODB_SESSION_EXPIRE_NOTIFY) { reset($ADODB_SESSION_EXPIRE_NOTIFY); $fn = next($ADODB_SESSION_EXPIRE_NOTIFY); $savem = $ADODB_SESS_CONN->SetFetchMode(ADODB_FETCH_NUM); $rs = $ADODB_SESS_CONN->Execute("SELECT expireref,sesskey FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); $ADODB_SESS_CONN->SetFetchMode($savem); if ($rs) { $ADODB_SESS_CONN->BeginTrans(); while (!$rs->EOF) { $ref = $rs->fields[0]; $key = $rs->fields[1]; $fn($ref,$key); $del = $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); $rs->MoveNext(); } $ADODB_SESS_CONN->CommitTrans(); } } else { $qry = "DELETE FROM $ADODB_SESSION_TBL WHERE sesskey = '$key'"; $rs = $ADODB_SESS_CONN->Execute($qry); } return $rs ? true : false; } function adodb_sess_gc($maxlifetime) { global $ADODB_SESS_CONN, $ADODB_SESSION_TBL,$ADODB_SESSION_EXPIRE_NOTIFY,$ADODB_SESS_DEBUG; if ($ADODB_SESSION_EXPIRE_NOTIFY) { reset($ADODB_SESSION_EXPIRE_NOTIFY); $fn = next($ADODB_SESSION_EXPIRE_NOTIFY); $savem = $ADODB_SESS_CONN->SetFetchMode(ADODB_FETCH_NUM); $t = time(); $rs = $ADODB_SESS_CONN->Execute("SELECT expireref,sesskey FROM $ADODB_SESSION_TBL WHERE expiry < $t"); $ADODB_SESS_CONN->SetFetchMode($savem); if ($rs) { $ADODB_SESS_CONN->BeginTrans(); while (!$rs->EOF) { $ref = $rs->fields[0]; $key = $rs->fields[1]; $fn($ref,$key); //$del = $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE sesskey='$key'"); $rs->MoveNext(); } $rs->Close(); $ADODB_SESS_CONN->Execute("DELETE FROM $ADODB_SESSION_TBL WHERE expiry < $t"); $ADODB_SESS_CONN->CommitTrans(); } } else { $qry = "DELETE FROM $ADODB_SESSION_TBL WHERE expiry < " . time(); $ADODB_SESS_CONN->Execute($qry); } // suggested by Cameron, "GaM3R" if (defined('ADODB_SESSION_OPTIMIZE')) { switch( $ADODB_SESSION_DRIVER ) { case 'mysql': case 'mysqlt': $opt_qry = 'OPTIMIZE TABLE '.$ADODB_SESSION_TBL; break; case 'postgresql': case 'postgresql7': $opt_qry = 'VACUUM '.$ADODB_SESSION_TBL; break; } } if ($ADODB_SESS_CONN->dataProvider === 'oci8') $sql = 'select TO_CHAR('.($ADODB_SESS_CONN->sysTimeStamp).', \'RRRR-MM-DD HH24:MI:SS\') from '. $ADODB_SESSION_TBL; else $sql = 'select '.$ADODB_SESS_CONN->sysTimeStamp.' from '. $ADODB_SESSION_TBL; $rs =& $ADODB_SESS_CONN->SelectLimit($sql,1); if ($rs && !$rs->EOF) { $dbts = reset($rs->fields); $rs->Close(); $dbt = $ADODB_SESS_CONN->UnixTimeStamp($dbts); $t = time(); if (abs($dbt - $t) >= ADODB_SESSION_SYNCH_SECS) { $msg = __FILE__.": Server time for webserver {$_SERVER['HTTP_HOST']} not in synch with database: database=$dbt ($dbts), webserver=$t (diff=".(abs($dbt-$t)/3600)." hrs)"; error_log($msg); if ($ADODB_SESS_DEBUG) ADOConnection::outp(" -- $msg

"); } } return true; } session_module_name('user'); session_set_save_handler( "adodb_sess_open", "adodb_sess_close", "adodb_sess_read", "adodb_sess_write", "adodb_sess_destroy", "adodb_sess_gc"); } /* TEST SCRIPT -- UNCOMMENT */ /* if (0) { session_start(); session_register('AVAR'); $_SESSION['AVAR'] += 1; print " -- \$_SESSION['AVAR']={$_SESSION['AVAR']}

"; } */ ?>