You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
151 lines
4.1 KiB
151 lines
4.1 KiB
<?php
|
|
/* For licensing terms, see /license.txt */
|
|
/**
|
|
* This class allows to manage the session. Session is stored in the database.
|
|
*
|
|
* @package chamilo.library
|
|
*/
|
|
/**
|
|
* @package chamilo.library
|
|
*/
|
|
class SessionHandler {
|
|
|
|
// TODO: Hm, these variables are public.
|
|
public $connection;
|
|
public $connection_handler;
|
|
public $lifetime;
|
|
public $session_name;
|
|
|
|
public function __construct() {
|
|
global $_configuration;
|
|
|
|
$this->lifetime = 60; // 60 minutes
|
|
|
|
$this->connection = array(
|
|
'server' => $_configuration['db_host'],
|
|
'login' => $_configuration['db_user'],
|
|
'password' => $_configuration['db_password'],
|
|
'base' => $_configuration['main_database']
|
|
);
|
|
|
|
$this->connection_handler = false;
|
|
}
|
|
|
|
public function sqlConnect() {
|
|
|
|
if (!$this->connection_handler) {
|
|
$this->connection_handler = @mysql_connect($this->connection['server'], $this->connection['login'], $this->connection['password'], true);
|
|
|
|
// The system has not been designed to use special SQL modes that were introduced since MySQL 5
|
|
@mysql_query("set session sql_mode='';", $this->connection_handler);
|
|
|
|
@mysql_select_db($this->connection['base'], $this->connection_handler);
|
|
|
|
// Initialization of the database connection encoding to be used.
|
|
// The internationalization library should be already initialized.
|
|
@mysql_query("SET SESSION character_set_server='utf8';", $this->connection_handler);
|
|
@mysql_query("SET SESSION collation_server='utf8_general_ci';", $this->connection_handler);
|
|
$system_encoding = api_get_system_encoding();
|
|
if (api_is_utf8($system_encoding)) {
|
|
// See Bug #1802: For UTF-8 systems we prefer to use "SET NAMES 'utf8'" statement in order to avoid a bizarre problem with Chinese language.
|
|
@mysql_query("SET NAMES 'utf8';", $this->connection_handler);
|
|
} else {
|
|
@mysql_query("SET CHARACTER SET '" . Database::to_db_encoding($system_encoding) . "';", $this->connection_handler);
|
|
}
|
|
}
|
|
|
|
return $this->connection_handler ? true : false;
|
|
}
|
|
|
|
public function sqlClose() {
|
|
|
|
if ($this->connection_handler) {
|
|
mysql_close($this->connection_handler);
|
|
$this->connection_handler = false;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public function sqlQuery($query, $die_on_error = true) {
|
|
|
|
$result = mysql_query($query, $this->connection_handler);
|
|
|
|
if ($die_on_error && !$result) {
|
|
$this->sqlClose();
|
|
return;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
public function open($path, $name) {
|
|
|
|
$this->session_name = $name;
|
|
return true;
|
|
}
|
|
|
|
public function close() {
|
|
return $this->garbage(0) ? true : false;
|
|
}
|
|
|
|
public function read($sess_id) {
|
|
|
|
if ($this->sqlConnect()) {
|
|
$result = $this->sqlQuery("SELECT session_value FROM ".$this->connection['base'].".php_session WHERE session_id='$sess_id'");
|
|
|
|
if ($row = mysql_fetch_assoc($result)) {
|
|
return $row['session_value'];
|
|
}
|
|
}
|
|
|
|
return '';
|
|
}
|
|
|
|
public function write($sess_id, $sess_value) {
|
|
$time = time();
|
|
|
|
if ($this->sqlConnect()) {
|
|
|
|
$result = $this->sqlQuery("INSERT INTO ".$this->connection['base'].".php_session(session_id,session_name,session_time,session_start,session_value) VALUES('$sess_id','".$this->session_name."','$time','$time','".addslashes($sess_value)."')", false);
|
|
|
|
if (!$result) {
|
|
$this->sqlQuery("UPDATE ".$this->connection['base'].".php_session SET session_name='".$this->session_name."',session_time='$time',session_value='".addslashes($sess_value)."' WHERE session_id='$sess_id'");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public function destroy($sess_id) {
|
|
|
|
if ($this->sqlConnect()) {
|
|
$this->sqlQuery("DELETE FROM ".$this->connection['base'].".php_session WHERE session_id='$sess_id'");
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public function garbage($lifetime) {
|
|
|
|
if ($this->sqlConnect()) {
|
|
|
|
$result = $this->sqlQuery("SELECT COUNT(session_id) FROM ".$this->connection['base'].".php_session");
|
|
list($nbr_results) = Database::fetch_row($result);
|
|
|
|
if ($nbr_results > 5000) {
|
|
$this->sqlQuery("DELETE FROM ".$this->connection['base'].".php_session WHERE session_time<'".strtotime('-'.$this->lifetime.' minutes')."'");
|
|
}
|
|
|
|
$this->sqlClose();
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|