/**
* Start user session.
*
* Note: This is intended to be called only from lib/setup.php!
*/
public static function start()
{
global $CFG, $DB;
if (isset(self::$sessionactive)) {
debugging('Session was already started!', DEBUG_DEVELOPER);
return;
}
self::load_handler();
// Init the session handler only if everything initialised properly in lib/setup.php file
// and the session is actually required.
if (empty($DB) or empty($CFG->version) or !defined('NO_MOODLE_COOKIES') or NO_MOODLE_COOKIES or CLI_SCRIPT) {
self::$sessionactive = false;
self::init_empty_session();
return;
}
try {
self::$handler->init();
self::prepare_cookies();
$newsid = empty($_COOKIE[session_name()]);
self::$handler->start();
self::initialise_user_session($newsid);
self::check_security();
} catch (\Exception $ex) {
@session_write_close();
self::init_empty_session();
self::$sessionactive = false;
throw $ex;
}
self::$sessionactive = true;
}
/**
* Start user session.
*
* Note: This is intended to be called only from lib/setup.php!
*/
public static function start() {
global $CFG, $DB;
if (isset(self::$sessionactive)) {
debugging('Session was already started!', DEBUG_DEVELOPER);
return;
}
self::load_handler();
// Init the session handler only if everything initialised properly in lib/setup.php file
// and the session is actually required.
if (empty($DB) or empty($CFG->version) or !defined('NO_MOODLE_COOKIES') or NO_MOODLE_COOKIES or CLI_SCRIPT) {
self::$sessionactive = false;
self::init_empty_session();
return;
}
try {
self::$handler->init();
self::prepare_cookies();
$isnewsession = empty($_COOKIE[session_name()]);
if (!self::$handler->start()) {
// Could not successfully start/recover session.
throw new \core\session\exception(get_string('servererror'));
}
self::initialise_user_session($isnewsession);
self::check_security();
// Link global $USER and $SESSION,
// this is tricky because PHP does not allow references to references
// and global keyword uses internally once reference to the $GLOBALS array.
// The solution is to use the $GLOBALS['USER'] and $GLOBALS['$SESSION']
// as the main storage of data and put references to $_SESSION.
$GLOBALS['USER'] = $_SESSION['USER'];
$_SESSION['USER'] =& $GLOBALS['USER'];
$GLOBALS['SESSION'] = $_SESSION['SESSION'];
$_SESSION['SESSION'] =& $GLOBALS['SESSION'];
} catch (\Exception $ex) {
self::init_empty_session();
self::$sessionactive = false;
throw $ex;
}
self::$sessionactive = true;
}
/**
* Starts the session.
*
* @return bool success
*/
public function start()
{
$default = ini_get('max_execution_time');
set_time_limit($this->acquiretimeout);
$result = parent::start();
set_time_limit($default);
return $result;
}
/**
* Constructs the writer, optionally starts the handler
* @param boolean $autostart set to true to autostart the handler
* @return void
*/
public function __construct($autostart = true)
{
$this->handler = \PhpConsole\Handler::getInstance();
$this->connector = $this->handler->getConnector();
if ($autostart && !$this->handler->isStarted()) {
$this->handler->start();
}
}
/**
* Start the session.
* @return bool success
*/
public function start()
{
// NOTE: memcached <= 2.1.0 expires session locks automatically after max_execution_time,
// this leads to major difference compared to other session drivers that timeout
// and stop the second request execution instead.
$default = ini_get('max_execution_time');
set_time_limit($this->acquiretimeout);
$result = parent::start();
set_time_limit($default);
return $result;
}
/**
* Start the session.
* @return bool success
*/
public function start()
{
// NOTE: memcached before 2.2.0 expires session locks automatically after max_execution_time,
// this leads to major difference compared to other session drivers that timeout
// and stop the second request execution instead.
$default = ini_get('max_execution_time');
set_time_limit($this->acquiretimeout);
$isnewsession = empty($_COOKIE[session_name()]);
$starttimer = microtime(true);
$result = parent::start();
// If session_start returned TRUE, but it took as long
// as the timeout value, and the $_SESSION returned is
// empty when should not have been (isnewsession false)
// then assume it did timeout and is invalid.
// Add 1 second to elapsed time to account for inexact
// timings in php_memcached_session.c.
// @TODO Remove this check when php-memcached is fixed
// to return false after key lock acquisition timeout.
if (!$isnewsession && $result && count($_SESSION) == 0 && microtime(true) - $starttimer + 1 >= floatval($this->acquiretimeout)) {
$result = false;
}
set_time_limit($default);
return $result;
}
