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126 lines
2.6 KiB
PHP
126 lines
2.6 KiB
PHP
<?php
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class Db
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{
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/* @var Db $instance */
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private static $instance;
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/* @var IDb $adapter */
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private $adapter;
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private $link;
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/* @var PDO $pdo */
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private $pdo;
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private function __clone() {
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//
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}
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private function legacy_connect() {
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user_error("Legacy connect requested to " . DB_TYPE, E_USER_NOTICE);
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$er = error_reporting(E_ALL);
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switch (DB_TYPE) {
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case "mysql":
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$this->adapter = new Db_Mysqli();
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break;
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case "pgsql":
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$this->adapter = new Db_Pgsql();
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break;
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default:
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die("Unknown DB_TYPE: " . DB_TYPE);
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}
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if (!$this->adapter) {
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print("Error initializing database adapter for " . DB_TYPE);
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exit(100);
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}
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$this->link = $this->adapter->connect(DB_HOST, DB_USER, DB_PASS, DB_NAME, defined('DB_PORT') ? DB_PORT : "");
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if (!$this->link) {
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print("Error connecting through adapter: " . $this->adapter->last_error());
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exit(101);
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}
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error_reporting($er);
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}
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// this really shouldn't be used unless a separate PDO connection is needed
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// normal usage is Db::pdo()->prepare(...) etc
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public function pdo_connect() {
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$db_port = defined('DB_PORT') && DB_PORT ? ';port=' . DB_PORT : '';
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$db_host = defined('DB_HOST') && DB_HOST ? ';host=' . DB_HOST : '';
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try {
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$pdo = new PDO(DB_TYPE . ':dbname=' . DB_NAME . $db_host . $db_port,
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DB_USER,
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DB_PASS);
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} catch (Exception $e) {
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print "<pre>Exception while creating PDO object:" . $e->getMessage() . "</pre>";
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exit(101);
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}
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$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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if (DB_TYPE == "pgsql") {
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$pdo->query("set client_encoding = 'UTF-8'");
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$pdo->query("set datestyle = 'ISO, european'");
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$pdo->query("set TIME ZONE 0");
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$pdo->query("set cpu_tuple_cost = 0.5");
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} else if (DB_TYPE == "mysql") {
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$pdo->query("SET time_zone = '+0:0'");
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if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) {
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$pdo->query("SET NAMES " . MYSQL_CHARSET);
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}
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}
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return $pdo;
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}
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public static function instance() {
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if (self::$instance == null)
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self::$instance = new self();
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return self::$instance;
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}
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public static function get() {
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if (self::$instance == null)
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self::$instance = new self();
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if (!self::$instance->adapter) {
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self::$instance->legacy_connect();
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}
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return self::$instance->adapter;
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}
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public static function pdo() {
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if (self::$instance == null)
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self::$instance = new self();
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if (!self::$instance->pdo) {
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self::$instance->pdo = self::$instance->pdo_connect();
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}
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return self::$instance->pdo;
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}
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public static function sql_random_function() {
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if (DB_TYPE == "mysql") {
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return "RAND()";
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} else {
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return "RANDOM()";
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}
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}
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}
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