session.inc in Drupal 4
Same filename and directory in other branches
User session handling functions.
File
includes/session.incView source
<?php
/**
* @file
* User session handling functions.
*/
function sess_open($save_path, $session_name) {
return TRUE;
}
function sess_close() {
return TRUE;
}
function sess_read($key) {
global $user;
// Write and Close handlers are called after destructing objects since PHP 5.0.5
// Thus destructors can use sessions but session handler can't use objects.
// So we are moving session closure before destructing objects.
register_shutdown_function('session_write_close');
// retrieve data for a $user object
$result = db_query("SELECT sid FROM {sessions} WHERE sid = '%s'", $key);
if (!db_num_rows($result)) {
$result = db_query("SELECT u.* FROM {users} u WHERE u.uid = 0");
}
else {
$result = db_query("SELECT u.*, s.* FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE s.sid = '%s'", $key);
}
// Build $user object:
$user = db_fetch_object($result);
$user = drupal_unpack($user);
// Add roles element to $user:
$user->roles = array();
if ($user->uid) {
$user->roles[DRUPAL_AUTHENTICATED_RID] = 'authenticated user';
$result = db_query("SELECT r.rid, r.name FROM {role} r INNER JOIN {users_roles} ur ON ur.rid = r.rid WHERE ur.uid = %d", $user->uid);
while ($role = db_fetch_object($result)) {
$user->roles[$role->rid] = $role->name;
}
}
else {
$user->roles[DRUPAL_ANONYMOUS_RID] = 'anonymous user';
}
return !empty($user->session) ? $user->session : '';
}
function sess_write($key, $value) {
global $user;
$result = db_query("SELECT sid FROM {sessions} WHERE sid = '%s'", $key);
if (!db_num_rows($result)) {
// Only save session data when when the browser sends a cookie. This keeps
// crawlers out of session table. This improves speed up queries, reduces
// memory, and gives more useful statistics. We can't eliminate anonymous
// session table rows without breaking throttle module and "Who's Online"
// block.
if ($user->uid || $value || count($_COOKIE)) {
db_query("INSERT INTO {sessions} (sid, uid, cache, hostname, session, timestamp) VALUES ('%s', %d, %d, '%s', '%s', %d)", $key, $user->uid, $user->cache, $_SERVER["REMOTE_ADDR"], $value, time());
}
}
else {
db_query("UPDATE {sessions} SET uid = %d, cache = %d, hostname = '%s', session = '%s', timestamp = %d WHERE sid = '%s'", $user->uid, $user->cache, $_SERVER["REMOTE_ADDR"], $value, time(), $key);
// TODO: this can be an expensive query. Perhaps only execute it every x minutes. Requires investigation into cache expiration.
if ($user->uid) {
db_query("UPDATE {users} SET access = %d WHERE uid = %d", time(), $user->uid);
}
}
return TRUE;
}
/**
* Called when an anonymous user becomes authenticated or vice-versa.
*/
function sess_regenerate() {
$old_session_id = session_id();
// We code around http://bugs.php.net/bug.php?id=32802 by destroying
// the session cookie by setting expiration in the past (a negative
// value). This issue only arises in PHP versions before 4.4.0,
// regardless of the Drupal configuration.
// TODO: remove this when we require at least PHP 4.4.0
if (isset($_COOKIE[session_name()])) {
setcookie(session_name(), '', time() - 42000, '/');
}
session_regenerate_id();
db_query("UPDATE {sessions} SET sid = '%s' WHERE sid = '%s'", session_id(), $old_session_id);
}
function sess_destroy($key) {
db_query("DELETE FROM {sessions} WHERE sid = '%s'", $key);
}
function sess_gc($lifetime) {
// Be sure to adjust 'php_value session.gc_maxlifetime' to a large enough
// value. For example, if you want user sessions to stay in your database
// for three weeks before deleting them, you need to set gc_maxlifetime
// to '1814400'. At that value, only after a user doesn't log in after
// three weeks (1814400 seconds) will his/her session be removed.
db_query("DELETE FROM {sessions} WHERE timestamp < %d", time() - $lifetime);
return TRUE;
}
Functions
Name | Description |
---|---|
sess_close | |
sess_destroy | |
sess_gc | |
sess_open | @file User session handling functions. |
sess_read | |
sess_regenerate | Called when an anonymous user becomes authenticated or vice-versa. |
sess_write |