PHP session有效期问题

php  /  管理员 发布于 7年前   163

define('STORE_SESSIONS','mysql');

if (STORE_SESSIONS == 'mysql') {
if (!$SESS_LIFE = get_cfg_var('session.gc_maxlifetime')) {
$SESS_LIFE = 1440;
}

function _sess_open($save_path, $session_name) {

// 如果没有连接数据库，可以在此执行mysql_pconnect,mysql_select_db
return true;
}

function _sess_close() {
return true;
}

function _sess_read($key) {
$value_query = mysql_query("select value from sessions where sesskey = '" .addslashes($key) . "' and expiry > '" . time() . "'");
$value = mysql_fetch_array($value_query);

if (isset($value['value'])) {
return $value['value'];
}

return false;
}

function _sess_write($key, $val) {
global $SESS_LIFE;

$expiry = time() + $SESS_LIFE;
$value = $val;

$check_query = mysql_query("select count(*) as total from sessions where sesskey = '" . addslashes($key) . "'");
$check = mysql_fetch_array($check_query);

if ($check['total'] > 0) {
return mysql_query("update sessions set expiry = '" . addslashes($expiry) . "', value = '" . addslashes($value) . "' where sesskey = '" . addslashes($key) . "'");
} else {
return mysql_query("insert into sessions values ('" . addslashes($key) . "', '" . addslashes($expiry) . "', '" . addslashes($value) . "')");
}
}

function _sess_destroy($key) {
return mysql_query("delete from sessions where sesskey = '" . addslashes($key) . "'");
}

function _sess_gc($maxlifetime) {
mysql_query("delete from sessions where expiry < '" . time() . "'");

return true;
}

session_set_save_handler('_sess_open', '_sess_close', '_sess_read', '_sess_write', '_sess_destroy', '_sess_gc');
}

danoo_session_name( 'dtvSid' );
danoo_session_save_path(SESSION_WRITE_DIRECTORY);