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140 lines
3.1 KiB
140 lines
3.1 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* This class allows to manage the session. Session is stored in
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* the database
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*
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* @package chamilo.library
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*/
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class session_handler {
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public $connexion;
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public $idConnexion;
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public $lifetime;
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public $sessionName;
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public function __construct () {
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global $_configuration;
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$this->lifetime=60; // 60 minutes
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$this->connexion=array('server' => $_configuration['db_host'],'login' => $_configuration['db_user'],'password' => $_configuration['db_password'],'base' => $_configuration['main_database']);
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$this->idConnexion=false;
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}
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public function sqlConnect () {
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if(!$this->idConnexion)
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{
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$this->idConnexion=@mysql_connect($this->connexion['server'],$this->connexion['login'],$this->connexion['password'],true);
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// The system has not been designed to use special SQL modes that were introduced since MySQL 5
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@mysql_query("set session sql_mode='';", $this->idConnexion);
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}
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return $this->idConnexion?true:false;
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}
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public function sqlClose() {
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if($this->idConnexion)
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{
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mysql_close($this->idConnexion);
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$this->idConnexion=false;
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return true;
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}
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return false;
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}
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public function sqlQuery ($query,$die_on_error=true) {
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$result=mysql_query($query,$this->idConnexion);
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if($die_on_error && !$result)
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{
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$this->sqlClose();
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return;
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//exit();
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}
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return $result;
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}
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public function open ($path,$name) {
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$this->sessionName=$name;
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return true;
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}
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public function close () {
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return $this->garbage(0)?true:false;
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}
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public function read ($sess_id) {
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if($this->sqlConnect())
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{
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$result=$this->sqlQuery("SELECT session_value FROM ".$this->connexion['base'].".php_session WHERE session_id='$sess_id'");
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if($row=mysql_fetch_assoc($result))
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{
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return $row['session_value'];
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}
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}
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return '';
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}
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public function write ($sess_id,$sess_value) {
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$time=time();
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if($this->sqlConnect())
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{
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$result=$this->sqlQuery("INSERT INTO ".$this->connexion['base'].".php_session(session_id,session_name,session_time,session_start,session_value) VALUES('$sess_id','".$this->sessionName."','$time','$time','".addslashes($sess_value)."')",false);
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if(!$result)
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{
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$this->sqlQuery("UPDATE ".$this->connexion['base'].".php_session SET session_name='".$this->sessionName."',session_time='$time',session_value='".addslashes($sess_value)."' WHERE session_id='$sess_id'");
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}
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return true;
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}
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return false;
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}
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public function destroy ($sess_id) {
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if($this->sqlConnect())
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{
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$this->sqlQuery("DELETE FROM ".$this->connexion['base'].".php_session WHERE session_id='$sess_id'");
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return true;
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}
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return false;
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}
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public function garbage ($lifetime) {
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if($this->sqlConnect())
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{
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$result=$this->sqlQuery("SELECT COUNT(session_id) FROM ".$this->connexion['base'].".php_session");
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list($nbr_results)=Database::fetch_row($result);
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if($nbr_results > 5000)
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{
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$this->sqlQuery("DELETE FROM ".$this->connexion['base'].".php_session WHERE session_time<'".strtotime('-'.$this->lifetime.' minutes')."'");
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}
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$this->sqlClose();
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return true;
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}
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return false;
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}
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};
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?>
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