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Copy pathsessionController.class.php
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154 lines (135 loc) · 3.76 KB
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<?php
/**
* Session Controller - Creates and Destroys sessions
*/
/* DB TABLE FOR SESSIONS
*
CREATE TABLE IF NOT EXISTS `sessions` (
`id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`uid` bigint(20) unsigned NOT NULL,
`ip` varchar(255) NOT NULL,
`sid` varchar(255) NOT NULL,
`expires` int(11) NOT NULL,
PRIMARY KEY (`sid`),
UNIQUE KEY `id` (`id`),
KEY `uid` (`uid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=0 ;
*/
class SessionController {
private$tablename = 'sessions';
private$db;
publicfunction__construct(){
$this->db = getDB();
}
publicfunctioncreate($user){
$uid = $user['uid'];
$ip = $this->getIp();
$sid = $this->makeSessionKey();
$session = array(
'uid' => $uid,
'ip' => $ip,
'sid' => $sid,
'expires' => time() + 3600
);
if($this->insertSession($session)){
return$session;
} else {
returnFALSE;
}
}
publicfunctioncheckSession($sid, $uid){
$query = "SELECT * FROM $this->tablename WHERE sid='$sid'";
$result = $this->db->query($query);
if($result !== FALSE){
if($result->num_rows > 0){
$values = $result->fetch_assoc();
$ip = $this->getIp();
$ret = ($uid == $values['uid'] && $ip == $values['ip'] && ($values['expires'] >= time()));
if($ret){ $this->updateSession($sid); }
return$ret;
} else {
returnFALSE;
}
} else {
report_error('Database Error: ', $this->db->error);
returnFALSE;
}
}
privatefunctioninsertSession($session){
$query = "INSERT INTO $this->tablename (";
//create a columns array and a values array - each being escaped of course
$columns = array();
$values = array();
foreach($sessionas$key=>$value){
$columns[] = $this->db->real_escape_string($key);
$values[] = $this->db->real_escape_string($value);
}
$query .= implode(', ', $columns) . ') VALUES (\'' . implode("', '", $values) . '\')';
if($this->db->query($query)){
$session['id'] = $this->db->insert_id;
return$session;
} else {
report_error('Database Error: ', $this->db->error);
returnFALSE;
}
}
privatefunctionupdateSession($sid){
$sid = $this->db->real_escape_string($sid);
$expires = time() + 3600;
if($this->db->query("UPDATE $this->tablename SET expires=$expires")){
returnTRUE;
} else {
report_error('Database Error: ', $this->db->error);
returnFALSE;
}
}
publicfunctiondeleteSession($sid){
$sid = $this->db->real_escape_string($sid);
if($this->db->query("DELETE FROM $this->tablename WHERE sid=$sid")){
returnTRUE;
} else {
report_error('Database Error: ', $this->db->error);
returnFALSE;
}
}
/**
* Retrieves the current users ip
*/
privatefunctiongetIp(){
if (isset($_SERVER['HTTP_X_FORWARD_FOR'])) {
$ip = $_SERVER['HTTP_X_FORWARD_FOR'];
} else {
$ip = $_SERVER['REMOTE_ADDR'];
}
return$ip;
}
/**
* Get the last created id in the database
*/
privatefunctiongetLastId(){
$query = 'SELECT id FROM ' . $this->tablename . ' ORDER BY id DESC LIMIT 1';
$result = $this->db->query($query);
if($result !== FALSE){
if($result->num_rows > 0){
$id = $result->fetch_assoc();
$id = $id['id'];
return$id;
} else {
returnFALSE;
}
} else {
report_error('Database Error: ', $this->db->error);
returnFALSE;
}
}
/**
* Make a session key
* Based on the site key and the current session num
*/
privatefunctionmakeSessionKey(){
global$site_secret;
$id = $this->getLastId();
returnmd5($site_secret . $id);
}
}
?>