Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
// Session management functions. These provide database storage of PHP
// session info.
require_once('include/cache.php');
$session_exists = 0;
$session_expire = 180000;
function ref_session_open($s, $n) {
return true;
}
function ref_session_read($id) {
global $session_exists;
if (!x($id)) {
return '';
}
$memcache = cache::memcache();
if (is_object($memcache)) {
$data = $memcache->get(get_app()->get_hostname().":session:".$id);
if (!is_bool($data)) {
return $data;
}
logger("no data for session $id", LOGGER_TRACE);
return '';
}
$r = q("SELECT `data` FROM `session` WHERE `sid`= '%s'", dbesc($id));
if (dbm::is_result($r)) {
$session_exists = true;
return $r[0]['data'];
} else {
logger("no data for session $id", LOGGER_TRACE);
}
return '';
}
/**
* @brief Standard PHP session write callback
*
* This callback updates the DB-stored session data and/or the expiration depending
* on the case. Uses the $session_expire global for existing session, 5 minutes
* for newly created session.
*
* @global bool $session_exists Whether a session with the given id already exists
* @global int $session_expire Session expiration delay in seconds
* @param string $id Session ID with format: [a-z0-9]{26}
* @param string $data Serialized session data
* @return boolean Returns false if parameters are missing, true otherwise
*/
function ref_session_write($id, $data) {
global $session_exists, $session_expire;
if (!$id || !$data) {
return false;
}
$expire = time() + $session_expire;
$default_expire = time() + 300;
$memcache = cache::memcache();
if (is_object($memcache)) {
$memcache->set(get_app()->get_hostname().":session:".$id, $data, MEMCACHE_COMPRESSED, $expire);
return true;
}
if ($session_exists) {
$r = q("UPDATE `session`
SET `data` = '%s', `expire` = '%s'
WHERE `sid` = '%s'
AND (`data` != '%s' OR `expire` != '%s')",
dbesc($data), dbesc($expire), dbesc($id), dbesc($data), dbesc($expire));
} else {
$r = q("INSERT INTO `session`
SET `sid` = '%s', `expire` = '%s', `data` = '%s'",
dbesc($id), dbesc($default_expire), dbesc($data));
}
return true;
}
function ref_session_close() {
return true;
}
function ref_session_destroy($id) {
$memcache = cache::memcache();
if (is_object($memcache)) {
$memcache->delete(get_app()->get_hostname().":session:".$id);
return true;
}
q("DELETE FROM `session` WHERE `sid` = '%s'", dbesc($id));
return true;
}
function ref_session_gc($expire) {
q("DELETE FROM `session` WHERE `expire` < %d", dbesc(time()));
return true;
}
$gc_probability = 50;
ini_set('session.gc_probability', $gc_probability);
ini_set('session.use_only_cookies', 1);
ini_set('session.cookie_httponly', 1);
if (!get_config('system', 'disable_database_session')) {
session_set_save_handler('ref_session_open', 'ref_session_close',
'ref_session_read', 'ref_session_write',
'ref_session_destroy', 'ref_session_gc');
}