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- <?php
- class Db
- {
- /* @var Db $instance */
- private static $instance;
- /* @var IDb $adapter */
- private $adapter;
- private $link;
- /* @var PDO $pdo */
- private $pdo;
- private function __clone() {
- //
- }
- private function legacy_connect() {
- user_error("Legacy connect requested to " . DB_TYPE, E_USER_NOTICE);
- $er = error_reporting(E_ALL);
- switch (DB_TYPE) {
- case "mysql":
- $this->adapter = new Db_Mysqli();
- break;
- case "pgsql":
- $this->adapter = new Db_Pgsql();
- break;
- default:
- die("Unknown DB_TYPE: " . DB_TYPE);
- }
- if (!$this->adapter) {
- print("Error initializing database adapter for " . DB_TYPE);
- exit(100);
- }
- $this->link = $this->adapter->connect(DB_HOST, DB_USER, DB_PASS, DB_NAME, defined('DB_PORT') ? DB_PORT : "");
- if (!$this->link) {
- print("Error connecting through adapter: " . $this->adapter->last_error());
- exit(101);
- }
- error_reporting($er);
- }
- private function pdo_connect() {
- $db_port = defined('DB_PORT') && DB_PORT ? ';port=' . DB_PORT : '';
- $db_host = defined('DB_HOST') && DB_HOST ? ';host=' . DB_HOST : '';
- try {
- $this->pdo = new PDO(DB_TYPE . ':dbname=' . DB_NAME . $db_host . $db_port,
- DB_USER,
- DB_PASS);
- } catch (Exception $e) {
- print "<pre>Exception while creating PDO object:" . $e->getMessage() . "</pre>";
- exit(101);
- }
- $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
- if (DB_TYPE == "pgsql") {
- $this->pdo->query("set client_encoding = 'UTF-8'");
- $this->pdo->query("set datestyle = 'ISO, european'");
- $this->pdo->query("set TIME ZONE 0");
- $this->pdo->query("set cpu_tuple_cost = 0.5");
- } else if (DB_TYPE == "mysql") {
- $this->pdo->query("SET time_zone = '+0:0'");
- if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) {
- $this->pdo->query("SET NAMES " . MYSQL_CHARSET);
- }
- }
- }
- public static function get() {
- if (self::$instance == null)
- self::$instance = new self();
- if (!self::$instance->adapter) {
- self::$instance->legacy_connect();
- }
- return self::$instance->adapter;
- }
- public static function pdo() {
- if (self::$instance == null)
- self::$instance = new self();
- if (!self::$instance->pdo) {
- self::$instance->pdo_connect();
- }
- return self::$instance->pdo;
- }
- }
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