function gc($maxlifetime)
{
$conn =& ADODB_Session::_conn();
$debug = ADODB_Session::debug();
$expire_notify = ADODB_Session::expireNotify();
$optimize = ADODB_Session::optimize();
$sync_seconds = ADODB_Session::syncSeconds();
$table = ADODB_Session::table();
if (!$conn) {
return false;
}
$time = time();
$binary = $conn->dataProvider === 'mysql' ? '/*! BINARY */' : '';
if ($expire_notify) {
reset($expire_notify);
$fn = next($expire_notify);
$savem = $conn->SetFetchMode(ADODB_FETCH_NUM);
$sql = "SELECT expireref, sesskey FROM {$table} WHERE expiry < {$time}";
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
$conn->SetFetchMode($savem);
if ($rs) {
$conn->StartTrans();
$keys = array();
while (!$rs->EOF) {
$ref = $rs->fields[0];
$key = $rs->fields[1];
$fn($ref, $key);
$del = $conn->Execute("DELETE FROM {$table} WHERE sesskey=" . $conn->Param('0'), array($key));
$rs->MoveNext();
}
$rs->Close();
$conn->CompleteTrans();
}
} else {
if (1) {
$sql = "SELECT sesskey FROM {$table} WHERE expiry < {$time}";
$arr =& $conn->GetAll($sql);
foreach ($arr as $row) {
$sql2 = "DELETE FROM {$table} WHERE sesskey=" . $conn->Param('0');
$conn->Execute($sql2, array($row[0]));
}
} else {
$sql = "DELETE FROM {$table} WHERE expiry < {$time}";
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
if ($rs) {
$rs->Close();
}
}
if ($debug) {
ADOConnection::outp("<p><b>Garbage Collection</b>: {$sql}</p>");
}
}
// suggested by Cameron, "GaM3R" <*****@*****.**>
if ($optimize) {
$driver = ADODB_Session::driver();
if (preg_match('/mysql/i', $driver)) {
$sql = "OPTIMIZE TABLE {$table}";
}
if (preg_match('/postgres/i', $driver)) {
$sql = "VACUUM {$table}";
}
if (!empty($sql)) {
$conn->Execute($sql);
}
}
if ($sync_seconds) {
$sql = 'SELECT ';
if ($conn->dataProvider === 'oci8') {
$sql .= "TO_CHAR({$conn->sysTimeStamp}, 'RRRR-MM-DD HH24:MI:SS')";
} else {
$sql .= $conn->sysTimeStamp;
}
$sql .= " FROM {$table}";
$rs =& $conn->SelectLimit($sql, 1);
if ($rs && !$rs->EOF) {
$dbts = reset($rs->fields);
$rs->Close();
$dbt = $conn->UnixTimeStamp($dbts);
$t = time();
if (abs($dbt - $t) >= $sync_seconds) {
$msg = __FILE__ . ": Server time for webserver {$_SERVER['HTTP_HOST']} not in synch with database: " . " database={$dbt} ({$dbts}), webserver={$t} (diff=" . abs($dbt - $t) / 60 . ' minutes)';
error_log($msg);
if ($debug) {
ADOConnection::outp("<p>{$msg}</p>");
}
}
}
}
return true;
}
if ($optimize) {
define('ADODB_SESSION_OPTIMIZE', $optimize);
}
define('ADODB_SESSION_SYNCH_SECS', $sync_seconds);
if (class_exists('ADODB_Session')) {
ADODB_Session::clob($clob);
ADODB_Session::dataFieldName($data_field_name);
ADODB_Session::database($database);
ADODB_Session::debug($debug);
ADODB_Session::driver($driver);
ADODB_Session::filter($filters);
ADODB_Session::host($host);
ADODB_Session::lifetime($lifetime);
ADODB_Session::optimize($optimize);
ADODB_Session::password($password);
ADODB_Session::syncSeconds($sync_seconds);
ADODB_Session::table($table);
ADODB_Session::user($user);
}
function NotifyFn($var, $sesskey)
{
echo "NotifyFn({$var}, {$sesskey}) called<br />\n";
}
if ($expire_notify) {
$ADODB_SESSION_EXPIRE_NOTIFY = array('debug', 'NotifyFn');
if (class_exists('ADODB_Session')) {
ADODB_Session::expireNotify(array('debug', 'NotifyFn'));
}
}
session_start();
$register = true;
