# along with wfpl; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-# you'll need this file that calles db_connect()
-if(!isset($GLOBALS['wfpl_db_handle'])) {
- require_once('db_connect.php');
-}
-# and these database tables:
+# you'll need these database tables:
# create table wfpl_sessions (id int unique auto_increment, session_key varchar(16), length int, expires int);
# create table wfpl_session_data (id int unique auto_increment, session_id int, name varchar(100), value text);
+# run this command to install/clear the tables:
+# mysql DATABASE_NAME < code/wfpl/examples/session.sql
+# note: you may need these parameters for mysql: -u USERNAME -p
# GLOSSARY
#
# generate a new random 16-character string
function session_generate_key() {
- $character_set = "abcdefghijklmnopqrstuvwqyzABCDEFGHIJKLMNOPQRSTUVWQYZ0123456789";
+ $character_set = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$id = " ";
# PHP 4.2.0 and up seed the random number generator for you.
$GLOBALS['session_key'] = $session_key;
$_REQUEST['session_key'] = $session_key; #just in case someone calls session_exists() after session_new()
session_touch($length);
+ return $GLOBALS['session_key'];
}
# call to renew the timeout for the session.
-# assumes there's a session. call session_init() if you'd like one auto-create one if not found.
+# assumes there's a session. call init_session() if you'd like one auto-create one if not found.
function session_touch($length = false) {
if(!$length) {
$length = db_get_value('wfpl_sessions', 'length', 'where id=%i', $GLOBALS['session_id']);
db_update('wfpl_sessions', 'expires', $expires, 'where id=%i', $GLOBALS['session_id']);
}
+# delete the current session
+function kill_session() {
+ if(!session_exists()) {
+ return;
+ }
+ _kill_session($GLOBALS['session_id']);
+}
+
+# for internal use. use kill_session() above
+function _kill_session($id) {
+ db_delete('wfpl_session_data', 'where session_id=%i', $id);
+ db_delete('wfpl_sessions', 'where id=%i', $id);
+}
+
# delete expired sessions from database
function session_purge_old() {
$now = time();
- $exired_sessions = db_get_column('wfpl_sessions', 'id', 'where expires < %i', $now);
- db_delete('wfpl_sessions', 'where expires < %i', $now);
- if($expired_sessions) {
- foreach($expired_sessions as $expired_session) {
- db_delete('wfpl_session_data', 'where session_id=%i', $expired_session);
- }
+ $expired_sessions = db_get_column('wfpl_sessions', 'id', 'where expires < %i', $now);
+ if($expired_sessions) foreach($expired_sessions as $expired_session) {
+ _kill_session($expired_session);
}
}
return false;
}
+ if(isset($GLOBALS['session_id'])) {
+ return true;
+ }
+
$session_key = ereg_replace('[^a-zA-Z0-9]', '', $_REQUEST['session_key']);
if(!strlen($session_key) == 16) {
}
}
-# delete the current session
-function kill_session() {
- if(!session_exists()) {
- return;
- }
- db_delete('wfpl_session_data', 'where session_id=%i', $GLOBALS['session_id']);
- db_delete('wfpl_sessions', 'where id=%i', $GLOBALS['session_id']);
-}
-
# save a variable into the session
function session_set($name, $value) {
- db_delete('wfpl_session_data', 'where session_id=%i && name=%"', $GLOBALS['session_id'], $name);
+ session_clear($name);
db_insert('wfpl_session_data', 'session_id,name,value', $GLOBALS['session_id'], $name, $value);
}
+# remove variable from the session
+function session_clear($name) {
+ db_delete('wfpl_session_data', 'where session_id=%i && name=%"', $GLOBALS['session_id'], $name);
+}
+
# get a variable into the session
function session_get($name) {
return db_get_value('wfpl_session_data', 'value', 'where session_id=%i && name=%"', $GLOBALS['session_id'], $name);