当他们的创建列数据太高时,我想清除数据库会话数据。如何成功地做到这一点?
编辑 :
一些代码:
// starting a session
public static function getIstance($_MYSESSION_CONF)
{
if (!isset(self::$instance)) {
$c = __CLASS__;
self::$instance = new $c;
self::$instance->setUp($_MYSESSION_CONF);
}
return self::$instance;
}
private function setUp($config) {
$this->db_type = $config["DATABASE_TYPE"];
$this->db_name = $config["DB_DATABASE"];
$this->db_pass = $config["DB_PASSWORD"];
$this->db_server = $config["DB_SERVER"];
$this->db_username = $config["DB_USERNAME"];
$this->table_name_session = $config["TB_NAME_SESSION"];
$this->table_name_variable = $config["TB_NAME_VALUE"];
$this->table_column_sid = $config["SID"];
$this->table_column_name = $config["NAME"];
$this->table_column_value = $config["VALUE"];
$this->table_column_fexp = $config["FEXP"];
$this->table_column_ua = $config["UA"];
$this->table_column_exp = $config["EXP"];
$this->sid_name = $config["SESSION_VAR_NAME"];
$this->overwrite = ($config["OVERWRITE_PHP_FUNCTION"]=='1')?true:false;
$this->sid_len = intval($config["SID_LEN"]);
$this->session_duration = intval($config["DURATION"]);
$this->session_max_duration = intval($config["MAX_DURATION"]);
$this->use_cookie = ($config["USE_COOKIE"]=='1')?true:false;
$this->encrypt_data = ($config["CRIPT"]=='1')?true:false;
$this->encrypt_key = $config["CRIPT_KEY"];
$this->hijackBlock = ($config["ENABLE_ANTI_HIJACKING"]=='1')?true:false;
$this->hijackSalt = $config["ANTI_HIJACKING_SALT"];
$this->dbConnection();
$this->readSessionId();
//check if i have to overwrite php
if ($this->overwrite) { // it's true
//yes.. i'm the best so i overwrite php function
//Make sure session cookies expire when we want it to expires
ini_set('session.cookie_lifetime', $this->session_duration);
//set the value of the garbage collector
ini_set('session.gc_maxlifetime', $this->session_max_duration);
// set the session name to our fantastic name
ini_set('session.name', $this->sid_name);
// register the new handler
session_set_save_handler(
array(&$this, 'open'),
array(&$this, 'close'),
array(&$this, 'read'),
array(&$this, 'write'),
array(&$this, 'destroy'),
array(&$this, 'gc')
);
// register_shutdown_function('session_write_close');
// start the session and cross finger
session_id($this->getSessionId());
session_start();
}
}
...
function gc($maxlifetime)
{
$diff = time() - $this->session_max_duration;
$this->SQLStatement_DeleteExpiredSession->bindParam(':time', $diff, PDO::PARAM_INT);
if ($this->SQLStatement_DeleteExpiredSession->execute()===FALSE) {
//trigger_error("Somenthing goes wrong with the garbace collector", E_USER_ERROR);
trigger_error("Somenthing goes wrong with the garbace collector");
} else {
return true;
}
}