- <?php
- /**
- * Sqlite保存SESSION
- */
- namespace Think\\Session\\Driver;
- use SessionHandlerInterface;
- use PDO;
- class Sqlite implements SessionHandlerInterface {
- static protected $tableNameName, $expire, $handler, $nowTime;
- public function __construct() {
- empty(static::$expire) && static::$expire = C('SESSION_EXPIRE', null, false) ? C('SESSION_EXPIRE') : ini_get('session.gc_maxlifetime');
- empty(static::$nowTime) && static::$nowTime = isset($GLOBALS['_beginTime']) ? $GLOBALS['_beginTime'] : microtime(true);
- empty(static::$tableNameName) && static::$tableNameName = C('SESSION_TABLE') ? C('SESSION_TABLE') : 'iSession';
- $dbFile = TEMP_PATH . 'Caches.tmp';
- $isCreate = is_file($dbFile);
- if (empty(static::$handler)) {
- static::$handler = new PDO("sqlite:{$dbFile}", null, null, array(PDO::ATTR_PERSISTENT => true));
- empty($isCreate) && $this->exec("PRAGMA encoding = 'UTF8';PRAGMA temp_store = 2;PRAGMA auto_vacuum = 0;PRAGMA count_changes = 1;PRAGMA cache_size = 9000;");
- $this->chkTable() || $this->createTable();
- }
- }
- /**
- * 创建SessionID
- * @return string
- */
- public function create_sid() {
- return uniqid(sprintf('%08x', mt_rand(0, 2147483647)));
- }
- /**
- * 打开session
- * @param string $path
- * @param string $name
- * @return boolean
- */
- public function open($path, $name) {
- return is_object(static::$handler);
- }
- /**
- * 关闭Session
- * @return boolean
- */
- public function close() {
- return true;
- }
- /**
- * 读取Session
- * @param string $id
- * @return string
- */
- public function read($id = null) {
- $table = static::$tableNameName;
- $sth = static::$handler->query("SELECT `value` FROM `{$table}` WHERE `id`='{$id}' AND `expire` > strftime('%s','now') LIMIT 1", PDO::FETCH_NUM);
- if (!empty($sth)) {
- list($data) = $sth->fetch();
- unset($sth);
- } else {
- $data = '';
- }
- return $data;
- }
- /**
- * 写入Session
- * @param string $id
- * @param string $data
- * @return integer
- */
- public function write($id = null, $data = null) {
- $table = static::$tableNameName;
- $expire = ceil(static::$expire + static::$nowTime);
- return $this->exec("REPLACE INTO `{$table}` VALUES('{$id}','{$data}',{$expire})");
- }
- /**
- * 销毁Session
- * @param string $id
- * @return integer
- */
- public function destroy($id = 0) {
- $table = static::$tableNameName;
- return $this->exec("DELETE FROM `{$table}` WHERE `id` = '{$id}'");
- }
- /**
- * 垃圾回收
- * @param string $expire
- * @return integer
- */
- public function gc($expire = 0) {
- $table = static::$tableNameName;
- return $this->exec("DELETE FROM `{$table}` WHERE `expire` < strftime('%s','now');VACUUM;");
- }
- /**
- * 检查当前表是否存在
- * @return bool 返回检查结果,存在返回True,失败返回False
- */
- protected function chkTable() {
- return in_array(static::$tableNameName, $this->getTables());
- }
- /**
- * 获取当前数据库的数据表列表
- * @return array 返回获取到的数据表列表数组
- */
- protected function getTables() {
- $tables = $data = array();
- $sth = $this->query("SELECT `name` FROM `sqlite_master` WHERE `type` = 'table' UNION ALL SELECT `name` FROM `sqlite_temp_master`");
- if (!empty($sth)) {
- while ($row = $sth->fetch(PDO::FETCH_NUM, PDO::FETCH_ORI_NEXT)) {
- $tables[] = $row[0];
- }
- unset($sth, $row);
- }
- return $tables;
- }
- /**
- * 创建当前数据表
- * @return integer 成功返回1,失败返回0
- */
- protected function createTable() {
- $tableName = static::$tableNameName;
- return $this->exec("CREATE TABLE IF NOT EXISTS `{$tableName}` (`id` VARCHAR PRIMARY KEY ON CONFLICT FAIL NOT NULL COLLATE 'NOCASE',`value` TEXT NOT NULL,`expire` INTEGER NOT NULL);");
- }
- public function __call($method, $arguments) {
- if (method_exists(self::$handler, $method)) {
- return call_user_func_array(array(self::$handler, $method), $arguments);
- } else {
- E(__CLASS__ . ':' . $method . L('_METHOD_NOT_EXIST_'));
- return;
- }
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/3004201512458.html
来源: http://www.codesnippet.cn/detail/3004201512458.html